Ar-15 300-221 Sbr

[ds762]

I am in the process of getting an upper together.

I currently have a Krieger bbl that my brother has machined for me. I have yet to set the gas block or drill the gas port or cut muzzle threads.

I know I want to put the gas port in the pistol position (like it ought to be). I am kinda up in the air over how to set up the upper for adjustable gas. I have looked at the JP adj. block, thought of making my VOLTAR GB into an adjustable system .. and then I saw the Fulton Armory adjustable gas tube. On Fulton's site they only list a rifle and carbine tube .. do they make an adjustable pistol tube? If not how hard would it be to make my tube into an adjustable system?

Currently the bbl is 14"? or so. I have plans to install this onto an A3 upper with my LaRue 7.0 railed handguard and am thinking I want to cut the barrel back to maybe 1 or 1.5" sticking out past the handguard. Any concerns I should have with this set-up?

ETA: I currently have an SAS 30 cal muzzle break mount silencer waiting on a F4 that will be used with this upper!

[AlcoholicusMaximus]

I have a 10.5" M1S SBR AR15 & found that I didn't need an adjustable gas block when I drilled my gas port to .086". I am cycling 220gr subsonics, & all types of supersonics. Just curious, why are you choosing a 14" barrel for your SBR?

[ds762]

Originally Posted by AlcoholicusMaximus

I have a 10.5" M1S SBR AR15 & found that I didn't need an adjustable gas block when I drilled my gas port to .086". I am cycling 220gr subsonics, & all types of supersonics. Just curious, why are you choosing a 14" barrel for your SBR?

that is the current length .. I am wanting to cut it back to about 8-8.5" (leaving about an 1" or so sticking out past my LaRue 7.0 handguards)

[Fudmottin]

Check with Paladin Machine to see if they have a block you want. I have a three way in the pistol position. Untested still due to lack of free time :-(

It goes High - Low - Closed.

[ds762]

tried paladin armory .. but I can't get into their site .. some google crap saying the site is infected or something like that .. got a direct link that works?

Thanks

[Fudmottin]

PM tp555 on this board. Paladin Machine Services != Paladin Armory so far as I know.

[pud-knocker]

I have a couple of the carbine length adjustable gas tubes, had problems with both after about 30 rounds....the pinned on block came loose to the point that the pin came out and the block rolls around on the tube....don't recommend them to anyone....

I use the adjustable PRI, JP, and un-adjustable Vltor in the pistol position....have had good results with all three....