CMC Triggers M-Lok Picatinny Rail, 5 Slot, Fits M-LOK Rail, 2.5 Long, Anodized Finish, Black 81722 Designed for use with all M-LOK compatible handguards and forends" M-LOK aluminum rail sections allow the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights" vertical grips" etc. Designed for use with all M-LOK compatible handguards and forends" M-LOK aluminum rail sections allow the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights" vertical grips" etc. Machined from milspec-anodized aluminum" M-LOK Rail Sections also feature beveled ends to reduce snagging and eliminate sharp corners and edges. All hardware necessary for attachment directly to M-LOK Slots on either aluminum or polymer handguards and forends is included.