MP5 Picatinny Stock Base Buffer Tube Adapter Set●20mm Picatinny Stock Base and Buffer Tube Adapter Set●Unlimited customization options with the M4 buffer tube conversion●Freely adjust the height for the best sight lines when aiming!Designed to make your favorite MP5 even more compact, lightweight and enables even more interfacing options. The LayLax picatinny 20mm stock base brings the highly customizable attachment 20mm platform to the rear of the gun for a more modern look with a variety of 1913 style stocks and braces. The included 20mm buffer tube adapter allows for even more stock options to attach your favorite M4 stocks. Fully adjustable 20mm base height for the best sight lines regardless of your eye protection!