User Panel
Posted: 3/16/2014 2:38:14 AM EDT
[Last Edit: Lancelot]
When discussing the Mk 18 / CQBR program, we can divide the history and discussion in to two distinct categories: 1) The weapon system itself / upper receiver supplied and 2) the group of accessories deployed on said weapon systems (SOPMOD).
---------- Mk 18 Mod 0 / CQBR The M4 carbine and M16 are not ideally suited for all missions, so it was proposed that the modularity of the M16 series would allow a user to replace the upper receiver of an existing weapon with one more suitable to the task. One of two proposed special mission receivers that were planned for inclusion into the SOPMOD Block II kit, the CQBR has taken off on its own. Like the proposed Special Purpose Receiver, the Close Quarters Battle Receiver has been more or less taken on by the Naval Surface Warfare Center, Crane Division (often referred to as NSWC-Crane or just "Crane") as its own project following the CQBR's removal from the SOPMOD program. Just as the Special Purpose Receiver morphed into the Special Purpose Rifle, and was type-classified as Mk 12 Mod 0/1, the complete CQBR-equipped carbine has been type-classified as the Mk 18 Mod 0. The purpose of the CQBR remains to provide operators with a weapon of submachine gun size, but firing a rifle cartridge, for scenarios such as VIP protection, urban warfare, and other close quarters battle (CQB) situations. The CQBR is designed to provide improvement over previous AR-15/M16-type weapons in this category. The CQBR is usually issued as a complete weapon system, and not just an upper receiver. The CQBR was once only available to Naval Special Warfare units, but the Mk 18 Mod 0 has become general issue for Visit, Board, Search, and Seizure (VBSS) missions and, as of 2006, for NCIS agents deploying to active combat zones.[citation needed] The Mk 18 is also used by the Coast Guard's Tactical Law Enforcement Teams, Maritime Safety and Security Teams, and Maritime Security Response Team and the United States Navy's Explosive Ordnance Disposal (EOD) Operators. Wikipedia has a good article with sources on the original CQBR/Mk 18 Mod 0 and its development. ---------- SOPMOD The SOPMOD Program Management Office at NSWC Crane, IN, provides standardized, versatile weapons accessories to meet needs across SOF mission scenarios. These accessories increase operator survivability and lethality by enhanced weapon performance, target acquisition, signature suppression, and fire control. The CQBR itself was originally part of the SOPMOD program as an accessory replacement upper receiver for the M4. However it was eventually separated out into its own project. SOPMOD accessories for the M4/CQBR originally included things like the KAC RIS/RAS, SOPMOD stock, KAC M4QD suppressor, AN/PEQ-2 illuminator/laser, ECOS-N red dot, ACOG, etc The SOPMOD program has gone through multiple minor and major evolutions throughout its lifetime. The most significant is commonly defined as "Block II" and included the introduction/replacement of accessories that met the updated needs of operators. The most visually significant "Block II" accessory is probably the replacement of the KAC rail/FSB with the Daniel Defense RIS II free float rail with low-profile gas block. Other updates include things like the Surefire SOCOM sound suppressor, EOTech RDS (553/SU-231 & EXPS 3-0/SU-231a), LA-5/PEQ ATPIAL, etc ---------- Link to docs and photo albums Presentation on CQBR from Crane Operator's Manual for Mk 18 Mod 0 SOPMOD Program Overview presentation from Crane Photo Album of Mk 18 Mod 0 Photo Album of CQBR with SOPMOD Block II accessories ---------- Because of the long history of both the CQBR/Mk 18 and SOPMOD programs, it's common to find weapons with various mixed configurations in the field, all depending on what time and unit the weapon system belongs to. Below are a few examples with descriptions to illustrate this. Example of a Mk 18 Mod 0 in as-issued configuration including: M16A1 surplus lower receiver, SOPMOD buttstock, KAC RIS, KAC M4QD flash hider, Aimpoint Comp M2 in Wilcox mount, LMT rear fixed sight, CQD rear sling plate. NSW Operator CQBRs with original SOPMOD accessories including KAC M4QD sound suppressor and AN/PEQ-2 IR Illuminator/Laser. Member of a Combat Camera team with a CQBR with KAC RAS and M4QD flash hider but with other updated accessories from the "Block II" SOPMOD kit including SU-231a (EOTech EXPS 3-0), EOTech G33 Magnifier, LA-5/PEQ ATPIAL, Insight WMX-200. Good example of "early" CQBR with SOPMOD Block II accessories including SU-231 (EOTech 553) and SU-233 (Insight M3x weaponlight). Example of a more "modern" CQBR with SOPMOD Block II accessories including the updated SU-231a (EOTech EXPS 3-0) and Insight WMX-200 weaponlight. Many times certain configurations are common within certain branches/groups. Here a Marine Raider is seen with a CQBR with an AN/PEQ-16 (USMC issued vs. the LA-5/PEQ SOCOM issued ATPIAL) and KAC NT4 suppressor (vs. the current Surefire SOCOM suppressor). ---------- Building a clone If you're interested in building a "clone" of a Mk 18 or CQBR equipped M4A1, here is a basic parts list to use as a guide and get you started. This list is not exhaustive and see the * note above regarding personalized accessories. | Mk 18 Mod 0 | M4A1 CQBR Block I | M4A1 CQBR Block II Lower Receiver | Mil-spec forged A1 | Mil-spec forged A2 | Mil-spec forged A2 Stock | Gen 1 SOPMOD (Black) | M4, CAR, SOPMOD, CTR & others | M4, CAR, SOPMOD, CTR & others Pistol Grip | A1 | A2, ERGO & others | A2, ERGO & others Rear Sling Plate | CQD | CQD | CQD Upper Receiver | Mil-spec forged M4 profile | Mil-spec forged M4 profile | Mil-spec forged M4 profile Barrel | 10.3" | 10.3" | 10.3" Rail | KAC RIS | KAC RAS | DD Mk18 RIS II (FDE) Rear BUIS | LMT Fixed | LMT Fixed, MATECH, & others | MATECH, KAC 300m, & others Front Sight | A2 FSB | A2 FSB | KAC 99051 BUIS (Taupe) Front Sling Attachment | FSB Sling Swivel | FSB Sling Swivel | CQD Muzzle Device | KAC M4QD | KAC M4QD | SureFire FH-556-RC Supressor | None | KAC QDSS NT4 | SureFire SOCOM556-RC (FDE) LAM | None | PEQ-2 | LA-5 Weaponlight | SureFire M962 | SureFire M952, M962 | Insight M3X (Tan), Insight WMX200 (Bronze) Optic | Aimpoint Comp M2 in Wilcox Mount | Aimpoint Comp M2 in QRP Mount, ACOG | EOTech 553 (Tan), EOTech EXPS3-0 (Tan), ELCAN 1-4x (FDE) ---------- Link to previous threads Previous Mk 18 / CQBR Thread Part I Previous Mk 18 / CQBR Thread Part II |
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Creator of the most viewed EE thread in ARFCOM history.
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Originally Posted By JohnnySasaki20:
Okay, so newb question here that I should have known like 5 years ago,...but what's the clone correct sling? I've been using this stupid Magpul thing since forever, and I wanna get rid of these stupid endplates and swap them for the CQD's. Also, just put a new upper together. Colt As Fuck upper, so no more dumbass DD markings on the side. Also, poopy stock. https://www.AR15.Com/media/mediaFiles/260264/LRM_EXPORT_20180427_162348-527420.JPG https://www.AR15.Com/media/mediaFiles/260264/LRM_EXPORT_20180427_162536-527421.JPG And I'm reverting back to the correct orientation for the CQD. I tried the reverse, but I don't think I like it. View Quote |
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Jesus came to comfort the afflicted and afflict the comfortable. - My Pastor
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Originally Posted By Dyzastr:
It is confusing with surefires 900 series. All 4 of these are m951 at different times in their production. Add an arms 17 mount, and all for become m952. As a kit with all the accessories these become m951xm07. XM = the tailcap and the 07=7", which is the length of the tape switch. Bottom one has an sw02 tailcap. http://i.imgur.com/GVjdEEN.jpg Add a km3 bezel and m93 qd latch and it becomes an m952v. (Tan one on the right.) http://i.imgur.com/poscpFd.jpg View Quote |
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"When a man knows he is to be hanged in a fortnight, it concentrates his mind wonderfully." - Dr. Samuel Johnson
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Originally Posted By Steinhatchee:
Thinking of spraying this thing.... https://i.imgur.com/lSd5gNk.jpg View Quote |
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ISO: TLR-6 for S&W Shield 9mm
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If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
Originally Posted By ArmyPilot12:
Wait...what? Milspec saying to NOT spray paint something? Had to go see if it was snowing outside here in Hell Paso. View Quote View All Quotes View All Quotes Originally Posted By ArmyPilot12:
Originally Posted By MILSPEC556:
I like it as is. Don't see any black renditions and i think it looks amazing with the shade of that RIS II Had to go see if it was snowing outside here in Hell Paso. |
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ISO: TLR-6 for S&W Shield 9mm
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Originally Posted By JJREA:
Nobody in the Block 1.5 thread has a crap fit about the slight differences in how you do the end of the barrel. I mean c'mon.... You got 14.5" A2X FH's. You got SBR's with a true 14.5" (probably not very many). You got the double washers. And like my M4gery barrel, you got the 14.7" with A2 pinned. Then there is that, is there that little step before the FH at the end of the barrel. Mine doesn't have it. Oh well. I don't think I'm planning on sending it back to ADCO just to have that little bit taken out. But then again it's not even the right barrel overall. It's a 1/9 SS HBar. Oh, and that didn't even include the 16"ers. Nobody gives anyone a tongue lashing for them. So almost 2" and over here .2" is a huge issue. Now, do I think it's dumb if people want it to be as close as possible to the real thing. Heck no. I get it. Attention to detail is just something people do. That's cool. But I mean, if I sent someone a 6920 barrel and told them to chop it to 10.3" to be a MK18 clone, and they sent it back and it was 10.5", I wouldn't even know the difference. I mean sure, people can tell. And I understand that claiming something is correct when it isn't, is just justifying. But making a big deal out of it either way is just........ Over the top if you ask me. My Colt A2 20" doesn't have a bayo lug. But in some ways it's a lot closer than some peoples builds, even if they have a bayo lug. I mean there are always going to be degrees. And any clone is just that, a clone. It's not the exact thing. Most of you all are so far out of the park with your lowers, since it has no happy switch. But nobody says boo about that. And the guys that actually do have an FA lower aren't lording it over everyone else. At least not that I've seen. View Quote |
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"Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity", MLK
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Not 10.2, not 10.4....10.3!!!!!
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ISO: TLR-6 for S&W Shield 9mm
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Where's @10point3 hiding these days? Haven't seen that dude around in a while.
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Code word is Yellow Umbrella.
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I attempted to remove the hood on my 552 the other day, and one of the heads are stripped out. Any suggestions on how to remove it? I have replacement screws on hand.
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Originally Posted By Dyzastr:
I attempted to remove the hood on my 552 the other day, and one of the heads are stripped out. Any suggestions on how to remove it? I have replacement screws on hand. View Quote Tig- yes I'm feeling ok lol |
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ISO: TLR-6 for S&W Shield 9mm
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Code word is Yellow Umbrella.
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Originally Posted By Dyzastr:
I attempted to remove the hood on my 552 the other day, and one of the heads are stripped out. Any suggestions on how to remove it? I have replacement screws on hand. View Quote https://lifehacker.com/5462520/remove-a-stripped-screw-with-a-rubber-band |
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Originally Posted By schaffer:
Rubber band before you start cutting... https://lifehacker.com/5462520/remove-a-stripped-screw-with-a-rubber-band View Quote View All Quotes View All Quotes Originally Posted By schaffer:
Originally Posted By Dyzastr:
I attempted to remove the hood on my 552 the other day, and one of the heads are stripped out. Any suggestions on how to remove it? I have replacement screws on hand. https://lifehacker.com/5462520/remove-a-stripped-screw-with-a-rubber-band |
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ISO: TLR-6 for S&W Shield 9mm
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Originally Posted By MILSPEC556:
My wife suggested that on a stripped screw on my bike (battery terminal screw) couldn't get it to work. Resulted in much profanity. View Quote A LH drill bit will work, with a particularly fucked bolt head, or in the event the head snaps off. |
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Originally Posted By DontBuryMe:
Never gotten the rubber band trick to work. A LH drill bit will work, with a particularly fucked bolt head, or in the event the head snaps off. View Quote View All Quotes View All Quotes Originally Posted By DontBuryMe:
Originally Posted By MILSPEC556:
My wife suggested that on a stripped screw on my bike (battery terminal screw) couldn't get it to work. Resulted in much profanity. A LH drill bit will work, with a particularly fucked bolt head, or in the event the head snaps off. |
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ISO: TLR-6 for S&W Shield 9mm
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Originally Posted By dafro:
Thanks! I bought it off the EE as that. Did some googling and it totally confused me. Thanks for clearing it up. View Quote View All Quotes View All Quotes Originally Posted By dafro:
Originally Posted By MILSPEC556:
Thanks to @krdt I now know that is a M952 (not to be mistaken with M952V) The M952 is a Surefire M951 with tape switch, ARMS #17 mount, and the I.R. filter. (Essentially- as a kit its a M952, the light by itself standard is a M951) |
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Without blood, it doesn't count!
"A gun, like any other source of power, is a force for good or evil, being neither in itself, but dependent upon those who possess it." |
Originally Posted By MILSPEC556:
My wife suggested that on a stripped screw on my bike (battery terminal screw) couldn't get it to work. Resulted in much profanity. View Quote View All Quotes View All Quotes Originally Posted By MILSPEC556:
Originally Posted By schaffer:
Originally Posted By Dyzastr:
I attempted to remove the hood on my 552 the other day, and one of the heads are stripped out. Any suggestions on how to remove it? I have replacement screws on hand. https://lifehacker.com/5462520/remove-a-stripped-screw-with-a-rubber-band |
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Without blood, it doesn't count!
"A gun, like any other source of power, is a force for good or evil, being neither in itself, but dependent upon those who possess it." |
Out of curiosity, what’s the consensus on the KAC grips at brownells? The same grip is listed twice, for $19.99 and $67.99...
https://www.brownells.com/rifle-parts/grip-parts/vertical-grips/ar-15-forward-vertical-grip-prod117515.aspx |
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Originally Posted By SgtOsiris:
Out of curiosity, what’s the consensus on the KAC grips at brownells? The same grip is listed twice, for $19.99 and $67.99... https://www.brownells.com/rifle-parts/grip-parts/vertical-grips/ar-15-forward-vertical-grip-prod117515.aspx View Quote |
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Without blood, it doesn't count!
"A gun, like any other source of power, is a force for good or evil, being neither in itself, but dependent upon those who possess it." |
Originally Posted By SgtOsiris:
Out of curiosity, what’s the consensus on the KAC grips at brownells? The same grip is listed twice, for $19.99 and $67.99... https://www.brownells.com/rifle-parts/grip-parts/vertical-grips/ar-15-forward-vertical-grip-prod117515.aspx View Quote |
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Creator of the most viewed EE thread in ARFCOM history.
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In that case, a few it is then. Probably not a bad piece to practice cutting down to stubby length before attempting that on my taupe
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I've seen the left hand drill bit done b4. I'll prob try the flat head slot first and if that fails, out comes the drill. What would I be rubber banding?
Edit- I see I have it backwards, try drill first, then flat head. I figured if I tried the bit first, that there wouldn't be much chance tryin anything else after that. Still, what's the rubber band for? Eta: saw the link, misunderstood at first. Definitely gonna start there, then move onto the more invasive procedures |
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Quick question on receiver extensions ... what would be correct for an early CQBR?
I know that Crane was using M16A1 lowers, obviously switched to a carbine buffer system, and sourcing the stocks from LMT. Would it be safe to assume they were getting the extensions from LMT as well? The reason I ask, is that I read somewhere that Colt never supplied more than a 4 position extension in .mil contracts (I assume that's to Big Army ??) but it seems all the LMT ones are 6 position. Would an early Crane built CQBR (with M16 lower) have a 4 position Colt or a 6 position LMT? Thanks guys. You're a wealth of knowledge! |
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"Malo periculosam libertatem quam quietam servitutem."
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Originally Posted By cdholmes:
FF RAS build coming soon...plus some other things https://www.AR15.Com/media/mediaFiles/414212/AA55C671-200F-4893-B835-9983A9CAEA14-527457.JPG View Quote |
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"Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity", MLK
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Originally Posted By iNeXile556:
Just curious as to what you guys think of this. http://cache.gettyimages.com/comp/1994905.jpg?x=x&dasite=MS_GINS&ef=2&ev=1&dareq=C56E7E4EBD8E3C9242E27E9BD6B7CA84 View Quote |
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Originally Posted By Dyzastr:
Had the day off yesterday and spent some time fine tuning a couple optics. The new barrel shot really well. It's a 10.3" colt socom profile. I can't remember, are FN the only documented socom profile 10.3"? The brass catcher makes for quick clean up and if I ever start to re-load I've got a nice supply of once fired brass. http://i.imgur.com/FCvqjgS.jpg View Quote CD |
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De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16' Afganistan: 09,10,11',14',17' & 18' |
Originally Posted By tifosi:
Quick question on receiver extensions ... what would be correct for an early CQBR? I know that Crane was using M16A1 lowers, obviously switched to a carbine buffer system, and sourcing the stocks from LMT. Would it be safe to assume they were getting the extensions from LMT as well? The reason I ask, is that I read somewhere that Colt never supplied more than a 4 position extension in .mil contracts (I assume that's to Big Army ??) but it seems all the LMT ones are 6 position. Would an early Crane built CQBR (with M16 lower) have a 4 position Colt or a 6 position LMT? Thanks guys. You're a wealth of knowledge! View Quote Attached File CD |
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De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16' Afganistan: 09,10,11',14',17' & 18' |
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Originally Posted By DontBuryMe:
I'm curious to know what organization or agency this individual is with. View Quote View All Quotes View All Quotes Originally Posted By DontBuryMe:
Originally Posted By iNeXile556:
Just curious as to what you guys think of this. http://cache.gettyimages.com/comp/1994905.jpg?x=x&dasite=MS_GINS&ef=2&ev=1&dareq=C56E7E4EBD8E3C9242E27E9BD6B7CA84 |
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Originally Posted By iNeXile556:
Just curious as to what you guys think of this. http://cache.gettyimages.com/comp/1994905.jpg?x=x&dasite=MS_GINS&ef=2&ev=1&dareq=C56E7E4EBD8E3C9242E27E9BD6B7CA84 View Quote Can't see where the barrel shoulder ends and the crush washer begins. Also, were LMT receivers marked with laser etching back in this time frame? May be good to get a high res close up of that area as well |
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ISO: TLR-6 for S&W Shield 9mm
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Originally Posted By MILSPEC556:
I honestly can't tell, (too stupid to know how to do high res) Can't see where the barrel shoulder ends and the crush washer begins. Also, were LMT receivers marked with laser etching back in this time frame? May be good to get a high res close up of that area as well View Quote |
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Originally Posted By DontBuryMe:
I can only find one other instance of the image. It appears in June, 2006 in an earlier iteration of this thread (here), where- surprise- pepole argue about whether or not it is 10.5/LMT or not and no resolution is found lol. View Quote View All Quotes View All Quotes Originally Posted By DontBuryMe:
Originally Posted By MILSPEC556:
I honestly can't tell, (too stupid to know how to do high res) Can't see where the barrel shoulder ends and the crush washer begins. Also, were LMT receivers marked with laser etching back in this time frame? May be good to get a high res close up of that area as well The world may never know. |
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ISO: TLR-6 for S&W Shield 9mm
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Originally Posted By DontBuryMe:
I can only find one other instance of the image. It appears in June, 2006 in an earlier iteration of this thread (here), where- surprise- pepole argue about whether or not it is 10.5/LMT or not and no resolution is found lol. View Quote View All Quotes View All Quotes Originally Posted By DontBuryMe:
Originally Posted By MILSPEC556:
I honestly can't tell, (too stupid to know how to do high res) Can't see where the barrel shoulder ends and the crush washer begins. Also, were LMT receivers marked with laser etching back in this time frame? May be good to get a high res close up of that area as well |
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"Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity", MLK
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Edit: disregard.
Found out why 10.3 vs 10.5. "It was found that 10.3 inches was the shortest the barrel could be for installing the KAC sound suppressor. " |
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Code word is Yellow Umbrella.
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Originally Posted By Tigwelder1971:
Okay...flame if you must.... Why 10.3" vs .5"??? I assume that Crane specd the length and gas port size. But what advantage is there? Barrels in the past have always been even or .5" increments. I'm sure it's someplace in the last 1k pages, but I cannot find it. View Quote I believe the reason 10.5 exists (and existed first) was for half inch increments |
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ISO: TLR-6 for S&W Shield 9mm
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Originally Posted By Tigwelder1971:
Edit: disregard. Found out why 10.3 vs 10.5. "It was found that 10.3 inches was the shortest the barrel could be for installing the KAC sound suppressor. " View Quote |
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"Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity", MLK
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Originally Posted By MILSPEC556:
Shortest they could go with a bayo lug/KAC NT4 is I believe what the reason was. On the Brit version (made by Diemaco/Colt Canada) I think they did away with the bayo lug so they could use 10" barrels. Which makes sense, because the bayo lug is useless on a 10.anything I believe the reason 10.5 exists (and existed first) was for half inch increments View Quote |
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Code word is Yellow Umbrella.
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Originally Posted By iNeXile556:
Good question. The only explanation I ever found was in this article. View Quote View All Quotes View All Quotes Originally Posted By iNeXile556:
Originally Posted By Tigwelder1971:
Edit: disregard. Found out why 10.3 vs 10.5. "It was found that 10.3 inches was the shortest the barrel could be for installing the KAC sound suppressor. " Same article that I was just reading. And where the quoted text came from. I gotta quit reading these threads. Just when I "think" I am content with my collection, I see another must have. |
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Code word is Yellow Umbrella.
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