This AR-15, M16 Handguard Accessory Rail Designed for use with full size rifle length AR-15, M16 USGI hand guards. This M16 Picatinny hand guard rail section attaches to your existing rifle length stock AR15 or M16 handguard works with most Colt, Bushmaster, DPMS rifle and more. Includes all mounting hardware. Machined aluminum construction combines strength with light weight. This rail gives the end user more room to mount various AR15 and M16 accessories available to the AR15 platform. Length: 11.22". Limited lifetime warranty. Accepts all 20mm accessory rails Includes mounting hardware