Hi,
We put 1500 rounds through one of these last Saturday. One of the lads in our club is an RFD and he brought it along to give it a thorough testing before deciding if he was going to start selling them. The only failures it had were a few failures to feed and these were all with winchester subs, it cycled other makes of subsonic and standard ammo flawlessly.
By the time we had put about 1000 rounds through the pistol it was absolutely filthy and yet it still functioned perfectly and never missed a beat!
Am I buying one? You bet your ass I am!
Cheers
Ian