Designed for use with all M-LOK compatible rails, this aluminum rail sections allows the attachment of various 1913 picatinny rail accessories such as lights, grips, and more. SPECS: Material: Aircraft grade aluminum alloy Hardware included. Made in the USA 3 SLOT M-LO PIC RAIL Usable 1913 style picatinny slots: 3 Overall length: 1.6 in MLOK coverage: 1 section 5 SLOT M-LO PIC RAIL Usable 1913 style picatinny slots: 5 Overall length: 2.5 in MLOK coverage: 1.5 sections 7 SLOT M-LO PIC RAIL Usable 1913 style picatinny slots: 7 Overall length: 3.3 in MLOK coverage: 2 sections" Mfg: Kinetic Development Group Llc