Great stock - FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock

Fits tight and works great. The cheek weld is firm and the threads on the tensioners are strong. The shock aborning aspect is only noticeable in a positive way, less barrel rise and recoil on my Armalite AR10). The rubber pad is almost too aggressive and wouldn't feel good bare chested. Battery storage is very sealed (you have to use the butt plate to remove the plug) and the slide off butt pad doesn't rattle but comes off without a tool. The adjustment button is forwarded, the opposite of most configurations. Fab makes great products, they aren't cheap, but they are true combat quality. I have the FAB Defense Gen-2 QR Vertical Pivoting Integrated bipod grip. It's incredibly awesome.