Description Reviews (0) LMT 40mm m203 receiver. Built to be mounted to any conventional 1913 Picatinny rails. Would not consist of barrel or sight. Involves three recoil lugs and a few locking lugs to hold to rail. Created from 7075 T6 aluminum forging for toughness.To get rolling, simply click the url underneath to go to mymagnow.com and find out