Description Opinions (0) LMT 40mm m203 receiver. Meant to be mounted to any conventional 1913 Picatinny rails. Does not incorporate barrel or sight. Involves 3 recoil lugs and 3 locking lugs to hold to rail. Designed from 7075 T6 aluminum forging for durability. I submitted an issue to IMR if https://mahendray592nwf6.buscawiki.com/user