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Posted: 12/1/2018 12:27:48 AM EST
[Last Edit: cjwwd2]
[#1]
Quote HistoryOriginally Posted By MJ11B4P:
Is the MK16/URG-I barrel nut the same as the MK14 rail? The aluminum MK14 nut is really lightweight. It’s a nice design and I’m sure it works really well as a heat sink for the barrel but curious if it could be a weak point in the system during drop testing. Perhaps steel or Ti might be a better material? I love the URX4 but I just don't see that being looked at closely/chosen as a replacement (if rumors turn out to be true, which I doubt) considering it has to be used with a mod2 like gas system (gas block/castle nut/threaded barrel). No way you're gonna tell me SOCOM or any specific branch is gonna go down that road right now. Yes, it can be used on a standard gas system upper, but it's a huge PITA |
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Posted: 12/1/2018 12:47:34 AM EST
[Last Edit: M4AZ]
[#2]
Got my 9.3 rail delivered today and went and grabbed a 4 prong and threw it all together.
 Attached File |
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USA
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Posted: 12/1/2018 1:50:37 AM EST
[Last Edit: rpoL98]
[#3]
Quote HistoryOriginally Posted By Conner378:
Got my 9.3 rail delivered today and went and grabbed a 4 prong and threw it all together. sorry, couldn't resist. seriously, they look good, regardless of installation method. |
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Posted: 12/1/2018 3:23:47 AM EST
[Last Edit: C6H12O6]
[#4]
Quote HistoryOriginally Posted By MILSPEC556:
High temp rattle can that sucker.  Quote HistoryOriginally Posted By MILSPEC556:
High temp rattle can that sucker. Originally Posted By Recce_Gear:
Originally Posted By JLAudio:
There are multiple versions of G gas blocks?  Attached FileAre you sure Bill G wasn’t talking about the difference between a regular non-G gas block like a Crane Mk12 vs a Geissele Super Gas Block? I don’t have calipers or a micrometer or anything but the nitride G block on my URG-I looks awfully similar to the stainless ones included with all the G rails I’ve bought (other than the finish). @sagmill @gacs |
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Posted: 12/1/2018 3:39:43 AM EST
[#5]
Quote HistoryOriginally Posted By C6H12O6: I’ve done that for some of my buddies’ guns but it drives my OCD wild so I can’t stomach it. https://www.AR15.Com/media/mediaFiles/123535/2FDF3C3C-1B99-419E-B83C-0110146E20D0_jpeg-756982.JPG Are you sure Bill G wasn’t talking about the difference between a regular non-G gas block like a Crane Mk12 vs a Geissele Super Gas Block? I don’t have calipers or a micrometer or anything but the nitride G block on my URG-I looks awfully similar to the stainless ones included with all the G rails I’ve bought (other than the finish). |
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Posted: 12/1/2018 5:21:32 AM EST
[#6]
Quote HistoryOriginally Posted By Conner378:
Got my 9.3 rail delivered today and went and grabbed a 4 prong and threw it all together. https://www.AR15.Com/media/mediaFiles/448813/27587F78-EB4E-4C0B-A9AE-D55FF464EDA4_jpeg-756930.JPG |
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Posted: 12/1/2018 10:41:07 AM EST
[Last Edit: FreefallRet]
[#7]
Quote HistoryOriginally Posted By Conner378:
Got my 9.3 rail delivered today and went and grabbed a 4 prong and threw it all together. https://www.AR15.Com/media/mediaFiles/448813/27587F78-EB4E-4C0B-A9AE-D55FF464EDA4_jpeg-756930.JPG Got my Colt SOCOM coming in today, just added another $1400 to my URG Bill 
The things I do to have a real Colt US gov marked receiver.
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Posted: 12/1/2018 11:04:15 AM EST
[#8]
Quote HistoryOriginally Posted By Conner378:
Got my 9.3 rail delivered today and went and grabbed a 4 prong and threw it all together. https://www.AR15.Com/media/mediaFiles/448813/27587F78-EB4E-4C0B-A9AE-D55FF464EDA4_jpeg-756930.JPG cheers |
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WA, USA
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Posted: 12/1/2018 11:09:18 AM EST
[#9]
Quote HistoryOriginally Posted By C6H12O6:
Are you sure Bill G wasn’t talking about the difference between a regular non-G gas block like a Crane Mk12 vs a Geissele Super Gas Block? I don’t have calipers or a micrometer or anything but the nitride G block on my URG-I looks awfully similar to the stainless ones included with all the G rails I’ve bought (other than the finish). |
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Posted: 12/1/2018 11:11:42 AM EST
[#10]
Quote HistoryOriginally Posted By Recce_Gear:
I am positive. It is smaller and the exterior features are less pronounced. Once you hold it next to a standard one, the differences are quite apparent. Quote HistoryOriginally Posted By Recce_Gear:
Originally Posted By C6H12O6:
Are you sure Bill G wasn’t talking about the difference between a regular non-G gas block like a Crane Mk12 vs a Geissele Super Gas Block? I don’t have calipers or a micrometer or anything but the nitride G block on my URG-I looks awfully similar to the stainless ones included with all the G rails I’ve bought (other than the finish). |
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Posted: 12/1/2018 11:22:58 AM EST
[Last Edit: 871JZ]
[#11]
Originally Posted By methical20: Can you find the link to him talking about the URX4? He has mentioned the G HK416 rail, Hodge 7075 Wedgelock and Hodge 6061 PLOK. I can't remember him talking about the URX4. I've been searching for it, but cannot find it. I'll continue looking... Originally Posted By Recce_Gear: Same G Block that is on the 14.5" Near Clone, so the lower profile one. The Stainless ones are not the same as the ones that come on the uppers, which is why I bought a stripped 10.3 upper and not the kit. ETA: Disregard. I see this has already been answered. Originally Posted By Ivan1:
People want a rail thats easy to install is why rails like the g are popular. I’m a big fan of the urx4. I even put one on my colt with a cut down fsb. Its not pretty though |
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Posted: 12/1/2018 11:30:07 AM EST
[#12]
Quote HistoryOriginally Posted By pezboytate: Geissele recently said all of their gas blocks sold/included with rails will be the new lower profile design. |
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Posted: 12/1/2018 11:33:26 AM EST
[#13]
Quote HistoryOriginally Posted By 871JZ:
So the Black Friday USASOC MK16 kits should have included the newer style blocks? I'd like to see pics of both side by side if anyone has both on hand and uninstalled to compare. And I'll look at what was included in the new MK16 kits and report back with a picture. Quote HistoryOriginally Posted By 871JZ:
Originally Posted By pezboytate: Geissele recently said all of their gas blocks sold/included with rails will be the new lower profile design. |
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Posted: 12/1/2018 11:36:45 AM EST
[#14]
Quote HistoryOriginally Posted By pezboytate:
All of the Mk16 ones should be new. The Mk4, Mk8, etc. may still be the old ones, depends on how long it takes them to transition. Quote HistoryOriginally Posted By pezboytate:
Originally Posted By 871JZ:
Originally Posted By pezboytate: Geissele recently said all of their gas blocks sold/included with rails will be the new lower profile design.  Attached File Attached File Attached File Attached File |
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MN, USA
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Posted: 12/1/2018 11:39:58 AM EST
[#15]
They have different generations of gas blocks and the newer one has the slightly smaller outside dimensions as well as uses a smaller roll pin for the “bombproof” install.
I know cause I had an older one I bought off EE and then a newer one I received with my rail. |
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Posted: 12/1/2018 11:42:30 AM EST
[Last Edit: pezboytate]
[#16]
Quote HistoryOriginally Posted By 871JZ: Well, here's pics of a block out of one of the MK16 kits. Can anyone confirm that it's the newer, reduced profile block? https://www.AR15.Com/media/mediaFiles/363550/20181201_113354_jpg-757241.JPG https://www.AR15.Com/media/mediaFiles/363550/20181201_113410_jpg-757242.JPG https://www.AR15.Com/media/mediaFiles/363550/20181201_113423_jpg-757243.JPG https://www.AR15.Com/media/mediaFiles/363550/20181201_113434_jpg-757244.JPG ETA: you can compare it to the drawing on the instructions. |
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MN, USA
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Posted: 12/1/2018 11:42:30 AM EST
[#17]
Quote HistoryOriginally Posted By 871JZ: Well, here's pics of a block out of one of the MK16 kits. Can anyone confirm that it's the newer, reduced profile block? |
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PA, USA
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Posted: 12/1/2018 11:42:36 AM EST
[#18]
Quote HistoryOriginally Posted By pezboytate: All of the Mk16 ones should be new. The Mk4, Mk8, etc. may still be the old ones, depends on how long it takes them to transition. 
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Posted: 12/1/2018 11:42:52 AM EST
[#19]
Quote HistoryOriginally Posted By yosturm:
They have different generations of gas blocks and the newer one has the slightly smaller outside dimensions as well as uses a smaller roll pin for the “bombproof” install. I know cause I had an older one I bought off EE and then a newer one I received with my rail. |
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PA, USA
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Posted: 12/1/2018 11:44:04 AM EST
[#20]
You will noticed the edges on the black ones have been filed down to fit inside the BCM QRF. The new one will definitely fit a lot better.
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Posted: 12/1/2018 11:44:40 AM EST
[#21]
Originally Posted By pezboytate: That's a new one, you can easily tell by the protrusions on the bottom. ETA: you can compare it to the drawing on the instructions. Originally Posted By yosturm: That is the newer one. The older one has a number 1 proofmark not a D like yours. Originally Posted By allensaldi: The one on the left is the one that came in all the USASOC Kits and Federal Rail Kits. The one on the right is an older stainless one that I have Nitrided myself. I had clearance issues with the Black one inside of a BCM QRF Handguard and needed to switch it out. https://farm5.staticflickr.com/4896/32260540748_062fff7fac_c.jpg https://farm5.staticflickr.com/4863/32260540818_d401dfbb01_c.jpg |
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PA, USA
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Posted: 12/1/2018 11:46:09 AM EST
[#22]
Also I am just noticing that after reading the new instructions you need a 5/32 drill bit. It used to be a 3/16. I was thinking the pilot hole looked smaller.
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MN, USA
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Posted: 12/1/2018 11:46:12 AM EST
[#23]
Quote HistoryOriginally Posted By 871JZ: Was the newer one designed specifically for clearance on the MK16, or was this a change made when the MK13/14's were released? Or maybe even before that? |
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PA, USA
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Posted: 12/1/2018 11:47:26 AM EST
[#24]
Quote HistoryOriginally Posted By 871JZ: Thanks, man. Thanks, dude. Is that the only difference? The reduced length on the bottom? 
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Posted: 12/1/2018 11:48:14 AM EST
[#25]
Quote HistoryOriginally Posted By yosturm:
I got my newer one with a mk14 so assuming it was made for that and not for the clearance issue with the mk16. Don’t know if there is a third gen being created for the mk16 or what. Quote HistoryOriginally Posted By yosturm:
Originally Posted By 871JZ: Was the newer one designed specifically for clearance on the MK16, or was this a change made when the MK13/14's were released? Or maybe even before that? |
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Posted: 12/1/2018 11:48:47 AM EST
[#26]
Quote HistoryOriginally Posted By allensaldi:
No it appears to be that the sides are also a smaller diameter as seen below. https://farm5.staticflickr.com/4914/46081734162_f55e41253b_c.jpg Quote HistoryOriginally Posted By allensaldi:
Originally Posted By 871JZ: Thanks, man. Thanks, dude. Is that the only difference? The reduced length on the bottom? https://farm5.staticflickr.com/4914/46081734162_f55e41253b_c.jpg |
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MN, USA
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Posted: 12/1/2018 11:49:09 AM EST
[#27]
Quote HistoryOriginally Posted By allensaldi:
Also I am just noticing that after reading the new instructions you need a 5/32 drill bit. It used to be a 3/16. I was thinking the pilot hole looked smaller. |
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PA, USA
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Posted: 12/1/2018 11:50:24 AM EST
[#28]
Quote HistoryOriginally Posted By 871JZ: Awesome. Thanks, man. |
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MN, USA
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Posted: 12/1/2018 11:50:32 AM EST
[Last Edit: yosturm]
[#29]
Quote HistoryOriginally Posted By 871JZ:
Is that the only difference? The reduced length on the bottom? Edit to add: allensaldi shows this in a picture above. |
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PA, USA
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Posted: 12/1/2018 11:53:05 AM EST
[#30]
Quote HistoryOriginally Posted By yosturm: Also some of the exterior dimensions are smaller for the new gen. For example, your first photo of the head on view, the older gas block walls are slightly thicker. Edit to add: allensaldi shows this in a picture above. |
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PA, USA
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Posted: 12/1/2018 11:54:59 AM EST
[#31]
Quote HistoryOriginally Posted By yosturm: Also some of the exterior dimensions are smaller for the new gen. For example, your first photo of the head on view, the older gas block walls are slightly thicker. Edit to add: allensaldi shows this in a picture above. 
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Posted: 12/1/2018 12:30:33 PM EST
[Last Edit: 871JZ]
[#32]
Quote HistoryOriginally Posted By yosturm: Correct. I have the 1st gen pinned to a barrel and wanted to swap it out for the new gen but the pin size is smaller for the new one. I contacted G customer service and they say it should still work but I am not too confident on that. I bought one for Black Friday so I am gonna check it out. 
As much as I hate to admit this, I don't think their customer service reps are any different than the bimbo's at any other company. Most often, they don't know the product all that well because they aren't personally interested in whatever it is that they manufacture, nor do they really care to learn it, and could care less whether they give the customer truthful information. I never call customer service for answers regarding a product unless I know it's possible to speak with a knowledgeable associate. Geissele has gotten so big that long gone are the days of calling in and immediately getting an OG on the phone. Best way to get an honest answer is to ask or research here. |
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Posted: 12/1/2018 1:23:42 PM EST
[#33]
Will a Colt OEM 2 work as a base to clone this rifle?
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Posted: 12/1/2018 1:27:48 PM EST
[Last Edit: 871JZ]
[#34]
Quote HistoryOriginally Posted By uniquesnd:
Will a Colt OEM 2 work as a base to clone this rifle? It will, but it won't be clone correct. You have a 16" carbine gassed M4 profile barrel. It should be a 14.5" midlength gas gov't profile barrel. Also, you would need to do away with your current shaved FSB and install a MK12 block. Up to you whether or not all this matters, but if you want an actual clone, that's what it has to be. |
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Posted: 12/1/2018 1:33:19 PM EST
[#35]
Quote HistoryOriginally Posted By uniquesnd:
Will a Colt OEM 2 work as a base to clone this rifle? If you got in on the black Friday Mk16 package, I say go for it. If you have no Mk16, you might as well just buy a URG-I upper |
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Posted: 12/1/2018 1:34:13 PM EST
[#36]
Quote HistoryOriginally Posted By uniquesnd:
Will a Colt OEM 2 work as a base to clone this rifle? |
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Posted: 12/1/2018 1:38:19 PM EST
[Last Edit: 871JZ]
[#37]
Quote HistoryOriginally Posted By MILSPEC556:
Yes. But you'll still need to swap the Colt barrel for a DD mid length barrel. If you got in on the black Friday Mk16 package, I say go for it. If you have no Mk16, you might as well just buy a URG-I upper Parts individually would run him about $800 after selling his current barrel to help offset some of the cost, plus he would have the right charging handle. If he bought the stripped upper he would have about the same invested after selling his current barrel, bit he wouldn't have the charging handle. So I think it would be best to just buy the stuff piecemeal. |
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Posted: 12/1/2018 1:43:15 PM EST
[#38]
I bought the kit on BF and originally was going to throw it on my Sig M400 but have been toying with the idea of building a clone. Thought I could buy an OEM one and get real close. Then over time scoop up the barrel and gas block etc as they come up for a good deal.
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Posted: 12/1/2018 1:45:30 PM EST
[Last Edit: 871JZ]
[#39]
Quote HistoryOriginally Posted By uniquesnd:
I bought the kit on BF and originally was going to throw it on my Sig M400 but have been toying with the idea of building a clone. Thought I could buy an OEM one and get real close. Then over time scoop up the barrel and gas block etc as they come up for a good deal. |
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Posted: 12/1/2018 1:49:52 PM EST
[#40]
Quote HistoryOriginally Posted By uniquesnd:
I bought the kit on BF and originally was going to throw it on my Sig M400 but have been toying with the idea of building a clone. Thought I could buy an OEM one and get real close. Then over time scoop up the barrel and gas block etc as they come up for a good deal. |
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Posted: 12/1/2018 1:52:36 PM EST
[Last Edit: 871JZ]
[#41]
There's a brand new barrel with the correct DD MK12 gas block in the EE right now for $270, if you need one. That's the going rate for these barrels new (in the EE) with either gas block. Sell your current Colt barrel and it won't cost you much difference and you'll get the right gas block and tube included. You'll have everything else you need with your MK16 kit and a Colt OEM.
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Posted: 12/1/2018 1:57:33 PM EST
[#42]
Added a Colt SOCOM lower today.
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Posted: 12/1/2018 1:59:50 PM EST
[#43]
Quote HistoryOriginally Posted By FREEFALLE7:
Added a Colt SOCOM lower today. https://www.AR15.Com/media/mediaFiles/20856/BD8289E6-5971-4279-AF3D-824B685E1C90-757377.jpg https://www.AR15.Com/media/mediaFiles/20856/2B0BE3BF-CC52-465A-A359-98ED1C67CE8F-757378.jpg |
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Posted: 12/1/2018 2:01:39 PM EST
[#44]
All rails seem to ship with new gas block here is a non nitride one I got a few months back with a Mk13 rail. Notice the bottom is shorter too. With shorter screws.
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Posted: 12/1/2018 2:01:59 PM EST
[#45]
Quote HistoryOriginally Posted By Conner378:
Where did you find that one finally? Quote HistoryOriginally Posted By Conner378:
Originally Posted By FREEFALLE7:
Added a Colt SOCOM lower today. https://www.AR15.Com/media/mediaFiles/20856/BD8289E6-5971-4279-AF3D-824B685E1C90-757377.jpg https://www.AR15.Com/media/mediaFiles/20856/2B0BE3BF-CC52-465A-A359-98ED1C67CE8F-757378.jpg |
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Posted: 12/1/2018 2:03:45 PM EST
[Last Edit: 871JZ]
[#46]
Quote HistoryOriginally Posted By FREEFALLE7:
Added a Colt SOCOM lower today. https://www.AR15.Com/media/mediaFiles/20856/BD8289E6-5971-4279-AF3D-824B685E1C90-757377.jpg https://www.AR15.Com/media/mediaFiles/20856/2B0BE3BF-CC52-465A-A359-98ED1C67CE8F-757378.jpg Here's mine.  Attached File |
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Posted: 12/1/2018 2:07:08 PM EST
[#47]
Quote HistoryOriginally Posted By loudxpack:
Do tell, I wish I grabbed a few more Colt lowers when Brownell's was selling them. Anyone know where else to get them currently at a non ridiculous price? Quote HistoryOriginally Posted By loudxpack:
Originally Posted By Conner378:
Originally Posted By FREEFALLE7:
Added a Colt SOCOM lower today. https://www.AR15.Com/media/mediaFiles/20856/BD8289E6-5971-4279-AF3D-824B685E1C90-757377.jpg https://www.AR15.Com/media/mediaFiles/20856/2B0BE3BF-CC52-465A-A359-98ED1C67CE8F-757378.jpg |
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Posted: 12/1/2018 2:28:07 PM EST
[#48]
Quote HistoryOriginally Posted By Conner378:
Where did you find that one finally? Quote HistoryOriginally Posted By Conner378:
Originally Posted By FREEFALLE7:
Added a Colt SOCOM lower today. https://www.AR15.Com/media/mediaFiles/20856/BD8289E6-5971-4279-AF3D-824B685E1C90-757377.jpg https://www.AR15.Com/media/mediaFiles/20856/2B0BE3BF-CC52-465A-A359-98ED1C67CE8F-757378.jpg Always good to have a extra upper, I'm just gonna build another block I with the upper and the clone lower. |
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Posted: 12/1/2018 2:28:17 PM EST
[#49]
Quote HistoryOriginally Posted By krdt: Find a 6920 cheap as possible and part it out for the lower? That's what I did with the 6920 OEM 2s that were on sale. Although, I still really want one of the Govt Property marked lowers... still probably gonna pick up one of those. 
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Posted: 12/1/2018 2:30:27 PM EST
[#50]
Quote HistoryOriginally Posted By 871JZ:
Very nice! Only thing I would change is the stock to a coyote Gen 1. Or a Gen 2 if that's your preference. Here's mine. https://www.AR15.Com/media/mediaFiles/363550/20181201_140253_jpg-757391.JPG Quote HistoryOriginally Posted By 871JZ:
Originally Posted By FREEFALLE7:
Added a Colt SOCOM lower today. https://www.AR15.Com/media/mediaFiles/20856/BD8289E6-5971-4279-AF3D-824B685E1C90-757377.jpg https://www.AR15.Com/media/mediaFiles/20856/2B0BE3BF-CC52-465A-A359-98ED1C67CE8F-757378.jpg Here's mine. https://www.AR15.Com/media/mediaFiles/363550/20181201_140253_jpg-757391.JPG Yea one day I might swap it out, however the stock goes with the ladder panels and will good for now. |
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