[MHGinTN]

The last AR I built I put the Osprey on fromt he start, choosing a nice rail gas block into which to insert the piton cup. I've butned through a couple thousand rounds with it so far and had exactly one failure to fire ... it was a Tula steel case round and apparently I loaded it int he mag without realizing it had no primer! Of course if it ever had powder in it that drained out when the bullet was seated, probably. I sent the round off to an ammo supplier I know for his amusement.

I've got an AR with the CMMG piston kit and one with the Adams Arms kit. Both work just fine, but for the mount it and forget it factor, I would go with the Osprey Defense system in a heartbeat. I've shot 75 grain all the way down to 52 grain ammo through the rifle and not a hiccup. I even loaded different weights in the same mag and had zero issues firing the entire mag. One caution: I put the Osprey on a 14.5 inch barrel gun and had to remove half a loop from the recoil buffer spring to function perfectly. I'm running a Lavange flash suppressor, welded on, and am tickled pink with it. Gun doesn't weigh much more than a loaded 1911 with a thirty round mag 5.56 in the AR.

Short of buying a SCAR 17, this is the best solution to the AR/M4 dirty dump in the bolt problem I can imagine. I've seen no evidence of carrier tilt/drag, so far.

[gigster]

Don’t know too much about firearms, do ya?
/s

[hiredhand]

Have you seen or heard of piston driven systems for the AR scraping the lower receiver at the rear, prior to going into the buffer tube on recoil? The “word” is that bolt carrier tilt can be an issue. I’m still holding off for the time being, but was strongly pondering the kit by CMMG. :-)