Arisaka Defense Low Profile Picatinny Rail M-LOK 3 Slot Black. It offers a reduced height to pull any Picatinny accessories closer to the handguard. The 5 slot model connects with three of Magpul's M-Lok nuts which will spread the increased stress of large Picatinny accessories like bipods or vertical grips over more M-Lok slots. The 3 slot version is useful when less rail space is required. The Low Profile Picatinny Rail is CNC machined from 6061-T6 aluminum and MIL-A-8625 Type III hard coat anodized. Requires a 1/8in Allen wrench for installation (not included). Our M-Lok nuts are manufactured by Magpul. Made in specialized factories. Specifications for Arisaka Defense Low Profile M-LOK Picatinny Rails: Manufacturer: Arisaka Defense Color: Black Finish: MIL-A-8625 Type III Hard Coat Anodized Fabric/Material: CNC machined from 6061-T6 aluminum Gun Rail: Picatinny Height: 0.277 in Condition: New Country of Origin: USA Package Contents: Arisaka Defense Low Profile Picatinny Rail M-LOK Arisaka Defense LPR-M-3: Low Profile Picatinny Rail M-LOK 3 Slot Black