FS a Shockmaster G2 recoil reducer. All the parts required to install the device are included. The unit came off a Beretta, and works great. Set the air at about 90psi and do away with recoil. You may have to change the butt pad to fit you gun. Install it yourself and save a bunch of money. $250.00 including shipping or make and offer. Installed they run over $1000.00.