Need a breech lock? get this! - GunVault BreechVault Pistol Breech Lock for Winchester, Remington and Mossberg pump shotguns

Overall a nice quality product. I did have to file the locking cam down a bit as it was so tight that I couldn't lock it in place. A little filing and smoothing with 320 grit sand paper and it works great.
Pros: Does what it was intended for
Cons: Had to file cam a bit to get it to lock properly with my Mossberg

This review was written in the old system and had content requirements that are different than reviews written today.