18.6" Barrels for AR15

I will be putting the RFQs in Monday.

I will have pricing once they come back.

We can make supply almost any barrel if there is demand, even blanks

The are button rifled.
 
Things I'm looking for in finished bargain AR barrels in order of priority:

1) Price. Cheaper the better.
2) No frills - I can do what I want with it once I have it. Nitriding is fine as the price difference is negligible.
3) "Common" or "versatile" twist rate. Main reason why I haven't gone for the 1:12 barrels you currently have in stock... just doesn't work with most loadings.
4) Other cals. From a production standpoint 300blk seems like a good second option as it just requires a different blank and reamer to begin with. I don't know how popular it is, and I accept an 18.5 inch barrel isn't ideal for the caliber, but I would like it. I would really like 7.62x39 but then you start getting into longer barrel extensions and proprietary bolt heads to avoid shearing bolt lugs.... If you can make it work there's a lot of surplus that people want to shoot out there :p

I would love to get my mitts on some "blanks" - basically finished barrels reamed, fitted and headspaced to their extensions, but with no profile or gas port. It would save me having to do it myself. I'd ideally want a blank a bit longer than 18.5 so I can futz around and not be starting right at 18.5 inches with no wiggle room to crown or change anything at the muzzle.
 
Im in...
-mid to light weight,
-.750 gas block...
-nitride
-Mid or rifle length gas system
-threaded obviously

Id buy one in 556 and in 7.62X39...
 
There just arent alot of 18.5 (or .6) inch AR barrels out there so anyone buying one of these reciever sets to build an NR AR-15... theyre going to need a barrel.
 
H Wally said:
Things I'm looking for in finished bargain AR barrels in order of priority:

1) Price. Cheaper the better.
2) No frills - I can do what I want with it once I have it. Nitriding is fine as the price difference is negligible.
3) "Common" or "versatile" twist rate. Main reason why I haven't gone for the 1:12 barrels you currently have in stock... just doesn't work with most loadings.
4) Other cals. From a production standpoint 300blk seems like a good second option as it just requires a different blank and reamer to begin with. I don't know how popular it is, and I accept an 18.5 inch barrel isn't ideal for the caliber, but I would like it. I would really like 7.62x39 but then you start getting into longer barrel extensions and proprietary bolt heads to avoid shearing bolt lugs.... If you can make it work there's a lot of surplus that people want to shoot out there :p

I would love to get my mitts on some "blanks" - basically finished barrels reamed, fitted and headspaced to their extensions, but with no profile or gas port. It would save me having to do it myself. I'd ideally want a blank a bit longer than 18.5 so I can futz around and not be starting right at 18.5 inches with no wiggle room to crown or change anything at the muzzle.
Click to expand...

^^^^^ MMmnnKay.
Headspaced blanks or even just basic options in 300blk please.
 
5.56 or .223 Wylde.

Please consider producing the 18.6" barrels with an intermediate length gas system as this is the most appropriate for the length.

The intermediate gas length adds longer dwell time to the system, which aids greatly in extraction and reliability while keeping the system from being "over gassed".
 
For +18" barrels a rifle length gas system is plenty reliable. Just ask these guys:

https://www.bravocompanyusa.com/BCM-18-Mk12-SS410-Barrel-with-Rifle-Length-Gas-p/bcm-brl-rec-18ss.htm

https://danieldefense.com/cold-hammer-forged-barrels/18-inch-chf-barrels/18-5-56mm-s2wr-rifle-length-chf-barrel.html

http://faxonfirearms.com/18-gunner-5-56-nato-rifle-length-4150-qpq/

http://ballisticadvantage.com/18-inch-556-spr-rifle-cmv-modern-barrel-ops12.html

For 223/556, there's more than enough energy under the pressure curve during the dwell period to cycle an AR. I run a 12.5" mid-length on one of my ARs, and still use an adjustable gas block to bring the pressure down by ~40%, and it still runs 100% even with weak ammo. The rifle length on 18" barrel dwell period is about 50% longer than that of a mid-length on a 12.5" barrel, and the energy content during that period is ~25% higher. So plenty reliable. As mentioned the longer gas systems also get you a lot of benefits including:

- softer/smoother recoil impulse
- less wear and tear on the BCG
- gas block further forward, easy front access under the handguard if adjustable
- longer sight radius on a sight block if using irons
- cooler/less cruddy gas being fed back into the action (this one i'm taking other people's word on)

The only times I've seen problems with an AR in terms of not cycling, it's either been an alternate caliber where the pressure curve for that caliber was not accounted for in the design or the gas port was simply undersized.
 
SSG69 said:
18.6"
Medium or government profile
Stress relieved.
5.56
1:7 or 1:8
Chrome lined
Cold Hammer Forged
Threaded
Click to expand...

+2. I don't understand wanting pencil barrels. The point of impact will change drastically as the barrel heats up. The slight increase in weight of the barrel would be worth it.
 
Absolutely agree the AR 15 will function reliably with an 18" (or 18.6 as is the case here). The ability to run a 12" handguard and still be able to cover the gas block under a free float tube with intermediate also saves weight out front.

I and others running 18" barrels with rifle length gas systems have experienced short stroking on cold days with this setup. The "pressure chamber" created by a longer port placement delivers lower pressures to the carrier which can induce "short stroke" failures with weak ammo in cold environments or with fouled guns. Having higher pressure combined with longer secondary dwell phase (bullet past the port) gives you the the extra pressure needed to reliably run the system in less than perfect situations ie. It runs more reliably. This system allows you to take advantage of an adjustable gas block to lessen the pressure if in ideal conditions or to reduce felt recoil during competition, where on a rifle length, if you're not getting enough gas you have to look for alternative solutions such as buffer weights etc.
 
homer76 said:
+2. I don't understand wanting pencil barrels. The point of impact will change drastically as the barrel heats up. The slight increase in weight of the barrel would be worth it.
Click to expand...

In that case, you wouldn't understand advancements to metallurgy over the last 60 years so it is not worth explaining to you.
 
yohann160 said:
In that case, you wouldn't understand advancements to metallurgy over the last 60 years so it is not worth explaining to you.
Click to expand...

...and I don't care to hear you explain advances in metallurgy. I have a bit of experience with the AR-15 and know through experience about shifting point of impact as barrels heat up. If the small amount of weight difference between a pencil and government profile barrel bothers you do a few extra arm curls.
 
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