Yankee Hill Machine M-LOK Continuous Picatinny Rail Section, 2.75 in. The Yankee Hill Machine M-LOK rail section adds a Picatinny mount for lights, lasers and grips on an M-LOK handguard. Sections can be mounted end to end for a continuous rail. 6061-T6 aluminum with hard coat and stainless M-LOK screws and nuts; installs with a 1/8 in. hex key. Key Features Picatinny on M-LOK. Stacks end to end. Stainless hardware. 2.75 in.. Will not loosen. Specifications Manufacturer Yankee Hill Machine Model M-LOK Picatinny Rail Section, 2.75 in. Part Number YHM-5400A UPC 816701019506 Interface M-LOK Length 2.75 in. Weight .832 oz Material 6061-T6 aluminum Hardware Stainless M-LOK screws and nuts Tool 1/8 in. hex key FAQs Can I join several? Yes, they mount end to end. What tool? A 1/8 in. hex key. How long? 2.75 in. Compare more rails and bases, scope rings at BattleHawk Armory.