Refer to 1913 Picatinny Rail Specifications Trirock KeyMod rail sections are precisely manufactured under the high quality control standards to fit the most Key Mod handguards and other weaver rail mount system. Built with 6061-T6 Aluminum plus accurate CNC process & fine black Anodized,which are scratch proof, rustless. Easy installation for rifle or shotgun, airsoft accessories like sling mounts, bipods, flashlights, grips, etc in keymod system,lightweight and compatible. Perfect addition for attaching your accessories, small and unobtrusive, snug and secure. Operation Tips: Put the half round protrusion forward and the round protrusion backward. The nuts fit the protrusions on the backside of the rail sections. Product Length: 3 Slot, 1.38 Inch Width: 0.83 inch Height: 0.39 inch Package: includes all necessary Steel Screws & Allen Wrench for easy installation.

Package includes Steel Screws & Allen Wrench for easy installation. The smoothly curve snag free edge eliminates sharp corners and edges,protects your hands and your equipment from scratching. The protrusions design solidly locks the key mod holes at the bottom with no movement,which holds firmly and prevents the rail sections from sliding off. Tightly connect the flashlights, bipods, forward grips, sights, or other accessories. Pretty fit for 21mm key mod handguard mounting system, picatinny & weaver rail.Ideal for attaching rifles,paintball & airsoft. Manufactured from ultra-durable Aerospace Grade aluminum 6061-T6. CNC process & Anodized.

Material: Alloy Steel. Brand: TRIROCK. Color: Black. Date First Available: April 9, 2018. Best Sellers Rank: #340,950 in Sports & Outdoors. Customer Reviews: 4.1 out of 5 stars 105 ratings 4.1 out of 5 stars. : B07C1YTDL6. Size: ?1.38 inch. Part Number: ?part_B07C1YTDL6. Manufacturer: ?Foshan Aplus. Material: ?Alloy Steel. Color: ?Black. Brand Name: ?TRIROCK. Package Weight: ?0.02 Kilograms. Item Package Dimensions L x W x H: ?3.9 x 1.5 x 0.87 inches.