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Posted: 9/29/2016 10:39:08 AM EDT
[#1]
+1. At this point Mark's generosity has provided multiple 556 Sparrel options for my current tOBR upper. I would really appreciate another tOBR upper to accommodate my growing number of 300 BLK barrels ( including the much anticipated 1st qtr BuildAR 12.5" barrel). Shorter tOBR rail would also be nice. Don't want to go through the angst of chopping down another one.
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SC, USA
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Posted: 10/5/2016 5:54:05 PM EDT
[#2]
Quote HistoryOriginally Posted By MFST1:
+1. At this point Mark's generosity has provided multiple 556 Sparrel options for my current tOBR upper. I would really appreciate another tOBR upper to accommodate my growing number of 300 BLK barrels ( including the much anticipated 1st qtr BuildAR 12.5" barrel). Shorter tOBR rail would also be nice. Don't want to go through the angst of chopping down another one. the wait will be worth it! i love my 12.5" larue .300 blk upper! its a shooter! |
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USA
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Posted: 10/5/2016 7:50:46 PM EDT
[#3]
Quote HistoryOriginally Posted By tacticalmedic450:
the wait will be worth it! i love my 12.5" larue .300 blk upper! its a shooter! Quote HistoryOriginally Posted By tacticalmedic450:
Originally Posted By MFST1:
+1. At this point Mark's generosity has provided multiple 556 Sparrel options for my current tOBR upper. I would really appreciate another tOBR upper to accommodate my growing number of 300 BLK barrels ( including the much anticipated 1st qtr BuildAR 12.5" barrel). Shorter tOBR rail would also be nice. Don't want to go through the angst of chopping down another one. the wait will be worth it! i love my 12.5" larue .300 blk upper! its a shooter! You probably have so much hate mail right now 
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Posted: 10/5/2016 8:46:54 PM EDT
[#4]
Quote HistoryOriginally Posted By tacticalmedic450:
the wait will be worth it! i love my 12.5" larue .300 blk upper! its a shooter! Quote HistoryOriginally Posted By tacticalmedic450:
Originally Posted By MFST1:
+1. At this point Mark's generosity has provided multiple 556 Sparrel options for my current tOBR upper. I would really appreciate another tOBR upper to accommodate my growing number of 300 BLK barrels ( including the much anticipated 1st qtr BuildAR 12.5" barrel). Shorter tOBR rail would also be nice. Don't want to go through the angst of chopping down another one. the wait will be worth it! i love my 12.5" larue .300 blk upper! its a shooter! Sooooo Jelly.
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Posted: 11/1/2016 8:02:39 PM EDT
[#5]
I seem to remember ordering a 300bo upper from larue... i mustve dreamt it.
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Posted: 11/2/2016 8:54:51 AM EDT
[#6]
It'll be a dream to shoot
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Posted: 11/8/2016 10:02:58 PM EDT
[#7]
I just election day panic bought some 300blk for my stealth2.0 300BO that may or may not ever ship
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Posted: 11/9/2016 7:26:02 AM EDT
[#8]
Also stacked some additional BH 300 BLK TMK super because....... well, just because.
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TN, USA
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Posted: 11/18/2016 2:06:52 PM EDT
[#9]
Checking in for updates. If someone already has a 556 tOBR will we just be able to purchase a 300blk tOBR barrel cartridge combo or will we have to purchase a complete upper?
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Posted: 11/18/2016 2:35:37 PM EDT
[#10]
Just the barrel cartridge. 556 upper and BCG will work just fine.
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TN, USA
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Posted: 11/18/2016 2:39:29 PM EDT
[#11]
Quote HistoryOriginally Posted By MFST1:
Just the barrel cartridge. 556 upper and BCG will work just fine. That's what I thought. Thanks. Can't wait for these to hit the shelves. |
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Posted: 11/20/2016 7:43:45 PM EDT
[#12]
ISO 10.5 300blk
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Posted: 11/23/2016 3:56:02 PM EDT
[Last Edit: Berger24]
[#13]
Just received my LT-104 and decided with the nice break in the weather today that I would dial in my Leupold for deer season and take care of some 'yotes I have blowing up my trail cams. This is a UHFO Larue .300blk out upper with a 16" barrel and a TranQuilo muzzle brake.
I used PNW Range 147gr to start and then moved onto using the Barnes TSX 110gr that I'm hunting with. After a four shot TSX group I then dialed accordingly and I put one more round on the dirty side. I moved to the clean side of Mark's supplied target for the last three shot group. I'd say that barrel likes the factory Barnes 110gr TSX pretty well. I don't have On Target because I'm running a Mac computer, but it appears as if this rifle can group pretty darn well. Larue .300blk 16" w/ TranQuilo mb Larue MBT Barnes Tac-TX FB 110gr LT-104 mount Leupold Mk4 4.5-14 
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Posted: 11/23/2016 7:19:13 PM EDT
[#14]
Very nice !! I have had similar results with the Barnes Vortex Tx Tac, , as well as with BH. Whisper supersonics. That's using a 10" non LaRue barrel. Hopefully the groups will tighten up even a bit more once the 1st quarter BuildAR 300 BLK 12" is available.
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USA
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Posted: 1/5/2017 1:43:56 PM EDT
[#15]
Coming up on two years since first post. . . . . . . . . . . . . . .
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Posted: 2/17/2017 5:42:05 PM EDT
[#16]
A guy has a Larue 16" .300blk barrel for sale that I just saw in the EE today...
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Posted: 2/17/2017 10:05:59 PM EDT
[#17]
Quote HistoryOriginally Posted By Berger24:
A guy has a Larue 16" .300blk barrel for sale that I just saw in the EE today... BuildAR. I've got two 12.5 300BO barrels but I forgot I gave my last gas block to a buddy. Will order more soon. |
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Posted: 2/23/2017 8:25:08 AM EDT
[Last Edit: Crazyhorse26]
[#18]
Got so tired of waiting for a 300 BO upper or barrel to buy, I ordered a PredatOBR in 7.62 x 51 to tide me over....
Expected a 2 to 4 month wait. Ordered on Saturday, shipped on Monday, at my local LGS on Friday. I'm impressed with the service and speed of fulfillment. Contemplating a day off from work to go break this rifle in.... |
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Posted: 2/24/2017 11:26:05 AM EDT
[#19]
Wow. Congrats. That'll do huh?
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TX, USA
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Posted: 2/24/2017 6:15:25 PM EDT
[#20]
Quote HistoryOriginally Posted By Crazyhorse26:
Got so tired of waiting for a 300 BO upper or barrel to buy, I ordered a PredatOBR in 7.62 x 51 to tide me over.... Expected a 2 to 4 month wait. Ordered on Saturday, shipped on Monday, at my local LGS on Friday. I'm impressed with the service and speed of fulfillment. Contemplating a day off from work to go break this rifle in.... Interesting, I ordered my tOBR 7.62 18 inch in October 2016 and I'm still waiting.... |
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Posted: 2/24/2017 7:02:33 PM EDT
[#21]
Quote HistoryOriginally Posted By thatdood:
Interesting, I ordered my tOBR 7.62 18 inch in October 2016 and I'm still waiting.... Quote HistoryOriginally Posted By thatdood:
Originally Posted By Crazyhorse26:
Got so tired of waiting for a 300 BO upper or barrel to buy, I ordered a PredatOBR in 7.62 x 51 to tide me over.... Expected a 2 to 4 month wait. Ordered on Saturday, shipped on Monday, at my local LGS on Friday. I'm impressed with the service and speed of fulfillment. Contemplating a day off from work to go break this rifle in.... Interesting, I ordered my tOBR 7.62 18 inch in October 2016 and I'm still waiting.... Guess you ordered too early |
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TX, USA
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Posted: 2/24/2017 7:10:43 PM EDT
[#22]
Quote HistoryOriginally Posted By APPARITION:
Guess you ordered too early Sounds like it! |
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Posted: 2/24/2017 8:18:50 PM EDT
[#23]
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WY, USA
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Posted: 2/24/2017 9:41:46 PM EDT
[#24]
This picture makes me wish that I added another 2.0 upper and 300BO barrel to my order.
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TX, USA
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Posted: 4/24/2017 1:28:25 PM EDT
[#25]
Good god all mighty...I would reeeeeeeally like to buy a shorty 300 blkout upper at some point in time
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TX, USA
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Posted: 5/8/2017 9:59:05 AM EDT
[#26]
I installed my Larue 16" 300 blackout barrel that I purchased from EE into my PredatAR. It operated flawlessly with the standard Larue low profile gas block but the gas in the face was very noticeable when shooting suppressed (indoors). Swapping in a Radian Raptor charging handle helped significantly.
Now to get the lower engraved and file the Form 1.... |
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Posted: 6/23/2017 12:13:06 PM EDT
[#27]
From all the years I've been buying and using LaRue gear, the worst and only negative thing I can come up with about LaRue, is the wait time till a Product starts shipping regularly... Stuff like new caliber barrels, New Uppers and Lowers... Some stuff I've been waiting years for and have no idea (other than 2 weeks) when its going to be available..
However, Once the minions and machines are churning them out pretty good and they have a stock of them, its not usual for them to go out within minutes or hitting the Submit button or hanging up the phone... |
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Posted: 7/4/2017 12:30:20 PM EDT
[#28]
Quote HistoryOriginally Posted By smullen:
From all the years I've been buying and using LaRue gear, the worst and only negative thing I can come up with about LaRue, is the wait time till a Product starts shipping regularly... Stuff like new caliber barrels, New Uppers and Lowers... Some stuff I've been waiting years for and have no idea (other than 2 weeks) when its going to be available.. However, Once the minions and machines are churning them out pretty good and they have a stock of them, its not usual for them to go out within minutes or hitting the Submit button or hanging up the phone... |
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Posted: 7/25/2017 8:10:50 AM EDT
[#29]
Hey for those of you who have a LaRue 300 Blackout barrel - anyone's have issues with the threading?
I just finished my BuildAR Stealth 2.0 last night (form 1 lower came back from engraver this week) The barrel threads seem a bit long/deep for the muzzle device I was planning to use (or the muzzle devices threads are too "shallow") - it's a griffin 30SD QD mount (came with my 30SD suppressor). There's too much space to use the shims. I'm thinking I'll either. Need to use my minimalist taper mount brake or send it to a gunsmith. I've waited so long for this tho between the BuildAR project and form 1/engraving I really don't want to have to wait again!! Here's a pic of what I mean: 
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Posted: 7/25/2017 8:13:35 AM EDT
[#30]
Oh and the "finished" product:
Pic is a side by side of the muzzle devices I have available to use. Can use the minimalist and attach my Optimus but I was really hoping to use the 30SD on this particular build... |
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Posted: 7/25/2017 10:34:50 AM EDT
[#31]
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Posted: 7/25/2017 10:58:09 PM EDT
[#32]
Quote HistoryOriginally Posted By bwall85:
Oh and the "finished" product: https://www.AR15.Com/media/mediaFiles/170073/E570FEBE-0F3B-4F44-AD14-D6A007C0EABF-262387.jpg Pic is a side by side of the muzzle devices I have available to use. Can use the minimalist and attach my Optimus but I was really hoping to use the 30SD on this particular build... |
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Posted: 7/27/2017 6:13:42 AM EDT
[#33]
Quote HistoryOriginally Posted By MFST1:
Sweet looking rifle. Congrats. No luv for the APEG's? Quote HistoryOriginally Posted By MFST1:
Originally Posted By bwall85:
Oh and the "finished" product: https://www.AR15.Com/media/mediaFiles/170073/E570FEBE-0F3B-4F44-AD14-D6A007C0EABF-262387.jpg Pic is a side by side of the muzzle devices I have available to use. Can use the minimalist and attach my Optimus but I was really hoping to use the 30SD on this particular build... Although whenever I build my .308 or SPR 5.56 I think an APEG will probably find it way to it. |
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Posted: 9/1/2017 5:15:56 PM EDT
[#34]
Quote HistoryOriginally Posted By bwall85:
Hey for those of you who have a LaRue 300 Blackout barrel - anyone's have issues with the threading? I just finished my BuildAR Stealth 2.0 last night (form 1 lower came back from engraver this week) The barrel threads seem a bit long/deep for the muzzle device I was planning to use (or the muzzle devices threads are too "shallow") - it's a griffin 30SD QD mount (came with my 30SD suppressor). There's too much space to use the shims. I'm thinking I'll either. Need to use my minimalist taper mount brake or send it to a gunsmith. I've waited so long for this tho between the BuildAR project and form 1/engraving I really don't want to have to wait again!! Here's a pic of what I mean: https://www.AR15.Com/media/mediaFiles/170073/7DF56E9C-B9F4-4A8D-9185-04676604ACA7-262011.jpg |
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FRA
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Posted: 9/4/2017 3:25:21 AM EDT
[#35]
Hi,
I'm planning to import a 300BO upper, but its impossible to do that with a barrel size under 16" because of ITAR restrictions. 
So I need to know which gas system is installed on theses barrels? Carbine or pistol? If it's a pistol length even on 16" it's possible for me to cut it here in France. Thanks for your help. |
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Posted: 9/4/2017 4:15:22 AM EDT
[#36]
Pistol gas system on the .300
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FRA
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Posted: 9/4/2017 10:54:47 AM EDT
[#37]
Quote HistoryOriginally Posted By jeep450:
Pistol gas system on the .300 |
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Posted: 9/14/2017 6:41:47 AM EDT
[#38]
Quote HistoryOriginally Posted By Yoyo10:
Great, thanks a lot. So it's possible to shorten it to 10.5" Quote HistoryOriginally Posted By Yoyo10:
Originally Posted By jeep450:
Pistol gas system on the .300 |
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FL, USA
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Posted: 2/5/2019 8:27:16 PM EDT
[Last Edit: Martianator]
[#39]
Spent every day on this forum about 5 or 6 years ago anxiously awaiting news on my 5.56 tOBR. Checked in multiple times a day. One ex-wife and 2 moves later. Still anxiously awaiting that 300 blackout barrel and shortened hand guard so that I can confidently take that beauty out on a boar hunt. Mark, I know you can hear me
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Posted: 5/15/2019 9:09:02 PM EDT
[Last Edit: RandyLahey01]
[#40]
Maybe Geissele will sell a 300 blackout barrel before Larue sells 300 barrels individually...
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TX, USA
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Posted: 5/30/2019 6:52:18 PM EDT
[#41]
Larue has become the largest vaporware maker in the industry.
After years of waiting I have given up on many products. Mark's definition of "soon" is 5 years or more. Thankfully the rest of the industry (even within a 50 mile radius of Larue) are producing great things. I am rather confident Mark will not reply to this and if he does he will have a excuse for not making things in 300. Again I still love Larue but as time goes by that love fades. |
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Posted: 9/10/2019 9:06:25 PM EDT
[#42]
A mostly LT 300 build. And results of work ups of 208 match subs shot fast at 50 yards.
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MI, USA
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Posted: 9/27/2023 1:08:52 PM EDT
[Last Edit: 1HI4X]
[#43]
Is anyone running their 300 suppressed? I’m curious what your spring/buffer recipe is. I recently added a SF Warcomp and SF 300 can to my 12” LT UU gun. I’ve tried carbine, H, H2 buffers and am still unable to get the gun to run with a standard carbine spring. I’m guessing the gas port size is the issue.
ETA: shooting subsonic factory Hornady w/ 208gr Amax |
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CA, USA
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Posted: 2/27/2024 5:47:37 PM EDT
[#44]
I have had minimal success running subsonics with my 12" UU kit. It is an early model from when they offered the free assembly.
I apologize for the vague data, I haven't been able to do more testing with this upper for a couple of years. It will not run any of the Prime brand 220 gr rounds suppressed or unsuppressed, it was cycling some hornady subs I had and some S&B subs both unsuppressed and suppressed with the tranquilo and an AAC 762. (all of which cycled in my 8.5" PSA upper both suppressed and unsuppressed Probable wildly overgassed per PSA SOP) I called to inquire about the issues and was told they don't recommend subsonic loads. I felt that was silly for a 300blk. I have some loads I worked up to try and get it to cycle subs, I might end up enlarging the gas port. |
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CA, USA
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Posted: 4/21/2024 9:33:09 PM EDT
[#45]
UPDATE!
I drilled out my gas port one size up, it was a#46 (0.081") I drilled it out to a #45 (0.086") she runs subsonics unsuppressed great. I fire a ton of the rounds I had that previously wouldn't cycle (prime ammo) cycled beautifully. Threw together a magazing full of 3-4 each random brands of subs and had zero malfunctions. |
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