Works great on moss500 - BlackHawk Knoxx Comp Stock Shotgun Stocks

I have 2 of these on Mossberg 500's. It helps take the bite out of full loads.

Put one on my son's SG when he was about 13 and he went through a full box of 25 shells first time he shot a 12ga. He wasn't a very big kid either.

Perhaps some of the issues on earlier reviews is making sure the recoil mechanism is centered properly and the screws holding it in are snugged down properly. The screws look like sheetrock screws and have a steep pitch.

I also lube the mechanism and spring with some lithium grease and that seemed to smooth out the mechanism.

Only oddity is the feeling of the stock rubbing against your face during recoil. Not a problem, but something to get used to.

My son has had this on his SG for about 15 yrs now. Added one to mine about 12 yrs ago.