Grendel upper?

[Brodady]

I think there is something to this. Check out this wildcat: http://www.ar15armory.com/forums/65mm-Pa...95187.html

I don't think anyone has checked velocity of that round from a shorter barrel yet, but I'm guessing that in a shorter barrel, the 5.56 case based round is more efficient. Not that one can achieve MORE velocity, but similar velocities. Of course, in a longer barrel, or with heavier bullets, the Grendel is going to win out.

I had been considering building either a lightweight pistol upper or 14.5" with a pinned flash suppressor in the PCC round primarily because of better efficiency in short barrels (plus being able to use 5.56 brass and magazines).

I have since shelved that idea in favor of the 7.62x40 Wilson Tactical. No point wasting 6.5 BCs in a short range firearm.

I have only fired a Grendel from 28", 18.5", 18" and 16" barrels. So far, my preferred barrel length is 18" to 18.5". The muzzle blast from the 16 is noticeably sharper than from the 18. To my ears at least. Of course, the 28" was just horribly unwieldy and didn't have enough increased velocity to justify the extra length and weight.

Will

So what is one was planning to put a suppressor on a 16" 6.5 Grendel? would this work out well?