Which Pistol Upper to run ??

[Morgan711]

I want to put together my ARPistol platform , I have the Reg.lower but need input on which upper to use ? Preferably piston operated w/7.5" barrel ,flat top & will be Suppressed. I hear stories of the shorter assys. not being very reliable ?
What you guys think ?

 

[salmonaxe]

Re: Which Pistol Upper to run ??

My SOT buddies PWS Diablo seems to be running pretty well.

I have a CMMG 7.3" upper that runs really good. It was made ages ago, and they used to have a special gasblock that supposedly had an expansion chamber in it for added reliability. Not sure if it really was needed, but it's always worked. I've always run the Noveske KX3 on it.