$99.00This stock adapter is designed for use with the MAX-11 mk2, MAX-31 mk2 and MAX-31A mk2 Slowfire Upper Receivers or other receivers with higher sight lines or scopes attached. Attaches to M-11/9 or M-11A1 lower receiver. Allows use of buttstocks manufactured by ACE LTD. USA. Also alows use of their folding stock mechanism, spacers and CAR15 Stock Block "Pig Nose" to attach an AR-15 stock. Two #10-32 threaded holes spaced .625" apart to match the ACE buttstock mounting footprint. Manufactured from 7075 aluminum and finihed in flat black anodize. Can be installed using the existing stock latch mechanism or use the included threaded block, bushing and screw for a "rock solid" installation.