Description Testimonials (0) LMT 40mm m203 receiver. Designed to be mounted to any typical 1913 Picatinny rails. Isn't going to contain barrel or sight. Consists of a few recoil lugs and three locking lugs to carry to rail. Crafted from 7075 T6 aluminum forging for toughness.Description Evaluations (0) This Walther PK380 makes an outstanding option