*sig Sauer Mpx 9mm Rear Adapter (flat Mount) With Upgraded Folding Adapter

This adapter and folding adapter will secure to the rear rail and will allow you to thread in any AR buffer tube, Mil Spec or Commercial. It offers a rear slide on clamp design that pinches around the rear OEM rail and offers a tight rattle free mount. Upgraded folding adapter offers upgraded machined parts, machined improved locking buffer tube slot to prevent turning, upgraded hinge spring, wiggle free locking hinge, slimmer design and harder coating. *This part number includes flat mount adapter and folding adapter only.