OK, I'm going to start messing with my AR upper (honestly, if you're not going to tinker with it, buy something other than an AR )
Anyway, I'm replacing the gas block with a low profile one so I can get the handguard I want.
Any appreciable benefit to an adjustable gas block when shooting 7.62x39?
I'll be shooting Wolf non-corrosive bi-metal hollow points, plus whatever I can get post-Russia sanctions.
Re: Adjustable gas blocks?
2I'm currently playing with an adjustable gas key and a low mass bolt for 5.56 AR. So far, I haven't been able to successfully cycle the bolt despite closing the key completely. I can throw my regular bolt in and it cycles just fine, even ran it at match. So I think my next step is to put a lighter buffer either JP or Taccom, or maybe I'll just pull some of the weights out. What I've found out is that once you start playing around with the gas block you'll probably need to look at your bolt, buffer, and buffer spring.
Re: Adjustable gas blocks?
3Not really. The main reason for adjustable blocks is for the folks running suppressors and certain SBR setups. If it ain't broke, and all that.senorgrand wrote:OK, I'm going to start messing with my AR upper (honestly, if you're not going to tinker with it, buy something other than an AR )
Anyway, I'm replacing the gas block with a low profile one so I can get the handguard I want.
Any appreciable benefit to an adjustable gas block when shooting 7.62x39?
I'll be shooting Wolf non-corrosive bi-metal hollow points, plus whatever I can get post-Russia sanctions.
Re: Adjustable gas blocks?
4If worst came to worst, you could turn off the gas and remove the gas tube and have a bolt action ar.... That's about the only advantage I can think of- as Swissdog points out, without a much shorter barrel or suppression.
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Re: Adjustable gas blocks?
5Check. No secret sauce.
Any recommendations or warnings about low profile gas blocks brands/models?
Any recommendations or warnings about low profile gas blocks brands/models?
Re: Adjustable gas blocks?
6BCM makes some of the best stuff in the industry. And it's cheap for a low-profile gas block from them:
https://www.rainierarms.com/?page=shop/ ... ct_id=3300
Double check the size, I think that barrel is .750
https://www.rainierarms.com/?page=shop/ ... ct_id=3300
Double check the size, I think that barrel is .750
Re: Adjustable gas blocks?
8Don't bother. There's a reason Stoner built it with only one setting. And like mentioned above they're only useful if it's suppressed (i.e. gas is turned off) or an SBR.
All problems can be solved with a copious amount of high explosives.
Re: Adjustable gas blocks?
9Thanks M4! Yeah, both those things are illegal here, so no point.
Not sure what Stoner would say about shooting commie ammo from his baby...
Not sure what Stoner would say about shooting commie ammo from his baby...
Re: Adjustable gas blocks?
10Actually, adjustable gas blocks are handy if you do 3gun. Paper rifle targets require either 1 shot in the Alpha zone or 2 shots anywhere in the targets. You can guess that most people just take two shots. Having an adjustable gas block (low mass BCG) and the appropriate buffer/spring can reduce felt recoil and muzzle rise. So when the game is just putting two shots on target as fast as you can, people try to eek out as much performance out of their rifle. They also tune their rifles to their ammunition.
Re: Adjustable gas blocks?
11I would probably drop to 5.56 for 3 gun...unless they had a steel portion.
Re: Adjustable gas blocks?
12Some clubs will let you use a 7.62x39 for heavy metal division, but I think that's a case-by-case basis. They use steel for precision shooting. The rules say a minimum of 70 yards for 5.56 on steel, but precision shooting can range out to 400 yards or more. Fun, especially after you've been running around with an elevated heart rate.
Adjustable gas blocks?
13+1 on BCM. Hard to find people who are unsatisfied with their rifles or components. Great company with a great product (I have one or two myself).shinzen wrote:BCM makes some of the best stuff in the industry. And it's cheap for a low-profile gas block from them:
https://www.rainierarms.com/?page=shop/ ... ct_id=3300
Double check the size, I think that barrel is .750
I never saw an adjustable gas block as a necessity unless you're running a suppressor. Noveske makes a great adjustable gas system for running suppressors. I believe it's called the "Switchblock."