This is the right component if you want the feel and comfort of an adjustable AR stock on your new MPA 22T. The addition of the AR stock will greatly improve accuracy and shot grouping as it provides a firm shoulder rest and helps to balance the weapon. * NFA rules apply, Addition of this item may require additional paperwork to be filed with the ATF, check with your local dealers. This part number is for the adapter only for all Master Piece Arms 22T guns only. You will need an AR rear stock to complete the setup. See other parts numbers for complete set up. (gun and other accessories sold separately) Installation instructions & allen wrench included. Works with most commercial sized AR type rear stocks & pistol buffer tubes.