SBR AR15 Suggestions

[CanadianMarksman]

I'm in the market for a new AR15, preferably 7.5".

I have heard of various issues regarding reliability and accelerated wear. Is there any truth to this?

What are some solid rifles in this configuration and where could I find them?

Thanks

 

[Waynetheman]

Noveske diplomat?

 

[FrankieT]

Build a 300 BLK. Build it short. It will run.

 

[sky52]

Build it with an adjustable gas block, eliminates half the issues associate with short barrel.

 

[platnumbob]

I think most issues are associated with gas systems shorter then carbine length. I have a 10.5 build with 100% reliability. Lots of people have 7.5's but probably more prone to be finicky.

 

[CanadianMarksman]

Would like to keep it 5.56 in order to maximize fireball and concussion

 

[enefgee]

Buy a PSA.

 

[terBC]

Buy a PSA.

I've got an 8.5" 5.56 PSA complete upper that's been 100% reliable with the pistol length gas tube and a standard buffer. It's a little on the loud side but it's a lot of fun.

 

[CanadianMarksman]

So I'd be fine with a standard run of the mill lower? Standard buffer tube etc.?

 

[enefgee]

So I'd be fine with a standard run of the mill lower? Standard buffer tube etc.?

Irunguns frequently has complete PSA (Palmetto State Arsenal) guns available - the buffer will be either H or H2, the receiver extension is the same for all carbine stocked AR's. The BCG will normally be a full auto version (heavier). The reason for the heavier buffer and BCG is that the gas pressure curve on a pistol length system is short but sharp, the extra weight helps smooth things out (a little). Beyond the buffer weight, a lower is a lower - so much so that KAC makes a PDW upper (that they won't sell us - I've asked) that goes on a standard AR lower, as well as the one on your sig line that fits the specialized PDW lower.

 

[Sqr]

So I'd be fine with a standard run of the mill lower? Standard buffer tube etc.?

You will be fine with standard lowers, uppers, charge handles, FCG's and bolt carrier groups however buffer springs, the buffer, gas blocks and gas tubes are the items you need to do research on. These are critical pieces to finely tune for such a short barrel and an over pressured gas system.

 

[tiriaq]

Would like to keep it 5.56 in order to maximize fireball and concussion

Put a good brake on it and it will be really impressive!

 

[kb007]

PWS - once you go piston, you never go back.

 

[CanadianMarksman]

Put a good brake on it and it will be really impressive!

I got a flash enhancing "loudener" already on it's way, will definitely get some pics of it if there is demand

 

[CanadianMarksman]

Got a PSA upper, now it's a matter of finding myself a solid lower that will allow for smooth operation

 

[kb007]

Why not get a PWS lower? I did that for my first PWS - bought the upper from a buddy, got a lower from CRAFM.

 

[BlackVoid]

Got a PWS upper, now it's a matter of finding myself a solid lower that will allow for smooth operation

I am eyeballing Windham Weaponry rifle, don't need the lower. PM me, may be we can come up with an offer to retailer, so they sell upper to me and lower to you.

 

[Brordo]

Shameless plug...but I do have an 8.5" complete AR for sale right now on the EE...

 

[Brappp306]

Noveske 10.5" LO-PRO Gas Block Barrel, AAC Brakeout 2.0 Compensator, VLTOR MUR 1 upper, BCM Gunfighter Charging Handle, BCM FA BCG, DD MK18 RIS 11 rail, Colt lower, BCM gunfighter stock, DD lower parts kit.

 

[Master-G]

I'll toss in another vote for a PWS lower--it's got their enhanced buffer tube with machined-in qd-swivel plus I think the newer ones come with ALG triggers--I know both of mine did.

What barrel length did you get?