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Posted: 8/21/2017 9:13:21 AM EDT
[#1]
I am, wanted a good cross between longer barrel for a bit of extra range, while still being compact enough to use to defend my house if needs be. I love it. It fills the role perfectly
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Posted: 8/21/2017 9:26:52 AM EDT
[#2]
I got extra parts laying around, that was sorta what I was thinking.
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Posted: 8/21/2017 9:45:38 AM EDT
[#3]
I run one as well and no issues here. My rifle has been used to teach my kids to shoot for the first time so, having an adjustable stock benefited me the most. The rifle is extremely soft shooting and I also run it suppressed so they wouldn't be intimidated their first time out.
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Posted: 8/21/2017 9:59:58 AM EDT
[#4]
They work well in semi. In auto they can be sensitive to variables.
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Posted: 8/21/2017 10:05:31 AM EDT
[#5]
http://www.ar15.com/forums/t_3_118/702698_--18-inch-barreled-AR15-lovefest-and-convention-pic-thread--.html
Some great setups in that thread. |
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Posted: 8/21/2017 10:09:28 AM EDT
[#6]
that's my setup. I have a Noveske 18" SPR barrel and a Noveske 4-picatinny-rail handguard, so it's a bit front-heavy. I plan on replacing the handguards with a Midwest Industries M-Lok lightweight handguard to reduce the weight.
it still balances well. |
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Posted: 8/21/2017 10:12:49 AM EDT
[#7]
Thanks for the link to pics.
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Posted: 8/21/2017 10:51:04 AM EDT
[#8]
18" .223 and 24" 6.5G with basic M4 stocks, both long range "precision" rifles.
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Posted: 8/21/2017 10:59:00 AM EDT
[#9]
I have a setup in this configuration. I am running a LaRue Tactical 18" Stealth barrel (mid-length gas) with a BCM A5 Intermediate Buffer System and LANTAC E-BCG. It is extremely smooth and dependable.
 Attached File |
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Posted: 8/21/2017 11:19:09 AM EDT
[#10]
Quote HistoryQuoted:
that's my setup. I have a Noveske 18" SPR barrel and a Noveske 4-picatinny-rail handguard, so it's a bit front-heavy. I plan on replacing the handguards with a Midwest Industries M-Lok lightweight handguard to reduce the weight. it still balances well. I bought a Magpul Pic QD adapter to move the sling further forward to see if I like how that balances. As far having or using a collapsing stock, I don't have a reason to collapse it anymore. |
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Posted: 8/21/2017 12:08:35 PM EDT
[#11]
The Army uses 20" bbls w/ collapsible stocks now.
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Posted: 8/21/2017 12:27:26 PM EDT
[#12]
Quote HistoryQuoted:
The Army uses 20" bbls w/ collapsible stocks now. |
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Posted: 8/21/2017 12:58:36 PM EDT
[#13]
Quote HistoryQuoted:
That is my experience with a DD 18" S2W barrel, a tad front heavy. Heavyish barrel profiles... I bought a Magpul Pic QD adapter to move the sling further forward to see if I like how that balances. As far having or using a collapsing stock, I don't have a reason to collapse it anymore. Quote HistoryQuoted:
Quoted:
that's my setup. I have a Noveske 18" SPR barrel and a Noveske 4-picatinny-rail handguard, so it's a bit front-heavy. I plan on replacing the handguards with a Midwest Industries M-Lok lightweight handguard to reduce the weight. it still balances well. I bought a Magpul Pic QD adapter to move the sling further forward to see if I like how that balances. As far having or using a collapsing stock, I don't have a reason to collapse it anymore. I shot my BCM upper with 16" extra-lightweight barrel last weekend. I got great slow-fire groups at 50 yards, like 10 rounds into a nickel, to zero my RDS, but at 100 yards that opened up to a 5" group once the barrel got warm. 
For my next build, I want an 18" Larue Stealth barrel 
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Posted: 8/21/2017 2:13:35 PM EDT
[#14]
Buddy has a 18 in larue stealth barrel on his rifle. It's a tack driver.
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Posted: 8/21/2017 2:41:36 PM EDT
[#15]
Quote HistoryQuoted:
Buddy has a 18 in larue stealth barrel on his rifle. It's a tack driver. |
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Posted: 8/21/2017 2:47:26 PM EDT
[#16]
18" rifle gas is my favorite setup.
LaRue is midlength, unfortunately. |
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Posted: 8/21/2017 4:33:52 PM EDT
[#17]
I run one on my 18" SPR. I love it. It helps to be able to adjust sometimes from awkward shooting positions or layered clothing etc.
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Posted: 8/21/2017 4:46:22 PM EDT
[#18]
Do it
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Posted: 8/21/2017 6:54:56 PM EDT
[#19]
Putting together an 18" Larue Stealth barrel with a Gen II UBR. Figure the barrel and stock should balance themselves out somewhat. Really not concerned about the weight as this will mostly be shot off a bench.
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Posted: 8/21/2017 9:46:18 PM EDT
[#20]
So playing with camo tape, and the Magpul Pic QD adapter this is about where I found a sling balanced in both vertical and horizontal carry on a heavyish 18' barrel With the DD stock fully extended. Well forward of the receiver, Slim Rail 15.0 point. Gas is rifle length. My plinker is getting there.
 Attached File |
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Posted: 8/21/2017 9:54:40 PM EDT
[#21]
top one
I built it for 3-gun matches, and also use it for coyote hunting 
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Posted: 8/22/2017 12:05:52 AM EDT
[#22]
I got 3 of them running. Great setup.
1/8 middy LW barrel from Spikes on a Spikes FL limited run lower. 1/8 middy BHW barrel on a Spikes lower. 1/7 rilfe Ballastic Advantage SPR barrel on a Spikes Crusader lower. |
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Posted: 8/22/2017 8:23:10 AM EDT
[#23]
Does anyone make an 18" bbl w/ the gas system @ the standard bayonet hilt length? (ie, carbine on 14.5" bbl, rifle gas on 20" bbl)
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Posted: 8/22/2017 10:01:22 AM EDT
[#24]
KAC or VLTOR intermediate might do it but no one makes them with FSB.
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Posted: 8/22/2017 10:20:34 AM EDT
[#25]
Quote HistoryQuoted:
Does anyone make an 18" bbl w/ the gas system @ the standard bayonet hilt length? (ie, carbine on 14.5" bbl, rifle gas on 20" bbl) To point out the obvious, a mid-length gas system with a FSB w/bayonet lug will work with a 16" barrel. A carbine-length gas system with a FSB w/ bayonet lug will work with a 14.5" barrel, and a rifle-length gas system with a FSB w/bayonet lug will work with a 20" barrel. |
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Posted: 8/22/2017 10:58:03 AM EDT
[#26]
This is one configuration I don't have, but would like to. I've got a couple spare 20" barrels laying around. Might chop one down to 18" and throw a SOPMOD on an A5 tube with a green spring. Bet it would shoot nice and soft.
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Posted: 8/22/2017 11:29:37 AM EDT
[#27]
Quote HistoryQuoted:
Why would anyone make such a configuration? It makes no sense whatsoever. I cannot understand some people's fascination with bayonets and odd ball, non-military barrel assembly configurations and attaching bayonets to them. To point out the obvious, a mid-length gas system with a FSB w/bayonet lug will work with a 16" barrel. A carbine-length gas system with a FSB w/ bayonet lug will work with a 14.5" barrel, and a rifle-length gas system with a FSB w/bayonet lug will work with a 20" barrel. Quote HistoryQuoted:
Quoted: Does anyone make an 18" bbl w/ the gas system @ the standard bayonet hilt length? (ie, carbine on 14.5" bbl, rifle gas on 20" bbl) To point out the obvious, a mid-length gas system with a FSB w/bayonet lug will work with a 16" barrel. A carbine-length gas system with a FSB w/ bayonet lug will work with a 14.5" barrel, and a rifle-length gas system with a FSB w/bayonet lug will work with a 20" barrel. |
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Posted: 8/22/2017 11:41:59 AM EDT
[#28]
Dwell time isn't measured in distance.
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Posted: 8/22/2017 12:39:07 PM EDT
[#29]
Quote HistoryQuoted:
I moot the idea not b/c of my love of bayonets, but b/c seemingly the AR gas system works relatively well w/ a bayonet's hilt length's dwell time, 14.5" carbine gas, 16" mid-gas, and 20" rifle gas. 
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Posted: 8/22/2017 12:48:49 PM EDT
[#30]
Quote HistoryQuoted:
Where did you get this idea? |
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Posted: 8/22/2017 4:42:36 PM EDT
[#31]
Quote HistoryQuoted:
Where did you get this idea? Quote HistoryQuoted:
Quoted: I moot the idea not b/c of my love of bayonets, but b/c seemingly the AR gas system works relatively well w/ a bayonet's hilt length's dwell time, 14.5" carbine gas, 16" mid-gas, and 20" rifle gas.
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Posted: 8/22/2017 6:55:46 PM EDT
[#32]
Quote HistoryQuoted:
You hear it lots here. From people who think dwell time is measured in inches. |
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Posted: 8/22/2017 6:57:48 PM EDT
[#33]
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Posted: 8/22/2017 7:01:06 PM EDT
[#34]
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Posted: 8/22/2017 7:46:47 PM EDT
[#35]
Quote HistoryI've been needing one of those. 
I'm well aware that there are several factors that go into the dwell time of the AR bolt. One of them is gas port location - and for some reason, the AR seems to work reasonably well when the gas port is a bayonet's hilt from the muzzle. To the extent that when it was realized that 16" carbine gas bbls were overgassed the universal commercial decision was to move the gas port from the 14.5" carbine gas location to - one bayonet hilt's distance from the muzzle. So is there a particular reason this hasn't been tried in the 18" bbl? |
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Posted: 8/23/2017 10:46:21 AM EDT
[#36]
I'm planning out an 18" grendel with a UBR gen 2 stock.
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Posted: 8/23/2017 10:56:26 AM EDT
[#37]
I think it's a good setup myself.
Mega upper/lower, Rainier Arms Ultramatch 18" (rifle gas), UBR. With an adjustable gas block (SLR) recoil is practically nil. Extremely easy to shoot. It's the rifle I put new shooters on...they make easy hits on our gongs at 300 yds and they're hooked. |
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Posted: 8/23/2017 11:18:38 AM EDT
[#38]
Quote HistoryQuoted:
Putting together an 18" Larue Stealth barrel with a Gen II UBR. Figure the barrel and stock should balance themselves out somewhat. Really not concerned about the weight as this will mostly be shot off a bench. |
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Posted: 8/23/2017 11:56:32 AM EDT
[#39]
I've been running that setup for years with my SPR rig.
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Posted: 8/23/2017 6:11:10 PM EDT
[#40]
My GTR is a 20" with a collapsible. My inspiration came from the Canadian C7A2. Honestly I love it. 18" isn't much different. I think you'll find the configuration ultra useful and very adaptable.
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Posted: 8/23/2017 9:19:25 PM EDT
[#41]
I don't want to free float it. I am going to just use the parts I have to build a standard upper. What do you guys think?
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Posted: 8/23/2017 9:52:00 PM EDT
[#42]
Quote HistoryQuoted:
I don't want to free float it. I am going to just use the parts I have to build a standard upper. What do you guys think? |
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Posted: 8/24/2017 12:39:30 AM EDT
[#43]
Quote HistoryQuoted:
I have a setup in this configuration. I am running a LaRue Tactical 18" Stealth barrel (mid-length gas) with a BCM A5 Intermediate Buffer System and LANTAC E-BCG. It is extremely smooth and dependable. https://www.AR15.Com/media/mediaFiles/76904/001-286154.JPG |
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Posted: 8/24/2017 4:44:45 PM EDT
[#44]
This set-up works great.
My slightly over-gassed 18" rifle eats anything and everything. I use an H2 buffer. |
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Posted: 8/24/2017 7:00:39 PM EDT
[#45]
Quote HistoryQuoted:
What grip is that? |
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Posted: 8/25/2017 8:25:08 AM EDT
[#46]
Quote HistoryQuoted:
The Army uses 20" bbls w/ collapsible stocks now. |
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Posted: 8/25/2017 8:25:36 AM EDT
[#47]
Quote HistoryQuoted:
I've been needing one of those.
I'm well aware that there are several factors that go into the dwell time of the AR bolt. One of them is gas port location - and for some reason, the AR seems to work reasonably well when the gas port is a bayonet's hilt from the muzzle. To the extent that when it was realized that 16" carbine gas bbls were overgassed the universal commercial decision was to move the gas port from the 14.5" carbine gas location to - one bayonet hilt's distance from the muzzle. So is there a particular reason this hasn't been tried in the 18" bbl? |
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Posted: 8/25/2017 8:47:43 AM EDT
[#48]
Quote HistoryQuoted:
I've seen a few "intermediate gas systems on 18" barrels, although bot very often. It's supposed to be somewhere between rifle and mid. Maybe that's what you are looking for? Quote HistoryQuoted:
Quoted:
I've been needing one of those.
I'm well aware that there are several factors that go into the dwell time of the AR bolt. One of them is gas port location - and for some reason, the AR seems to work reasonably well when the gas port is a bayonet's hilt from the muzzle. To the extent that when it was realized that 16" carbine gas bbls were overgassed the universal commercial decision was to move the gas port from the 14.5" carbine gas location to - one bayonet hilt's distance from the muzzle. So is there a particular reason this hasn't been tried in the 18" bbl? |
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Posted: 8/25/2017 8:54:42 AM EDT
[#49]
I just set up a 18" barrel with rifle-length gas system on a collapsible carbine-length stock. Got the standard buffer in there for now, will run it on Sunday and see how it does. Even with the stock collapsed, it's not too front-heavy. Lightweight hand guard helps for sure.
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Posted: 8/25/2017 10:56:43 AM EDT
[#50]
Quote HistoryQuoted: I've seen a few "intermediate gas systems on 18" barrels, although bot very often. It's supposed to be somewhere between rifle and mid. Maybe that's what you are looking for? |
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