The Python Handguard is based on LVOA AR15 assault rifle furniture - LVOA stands for low visibility operation application. This handguard ultra-light aluminum. Designed for quick detach and the ability to attach M-Lok and Keymod accessories. Made to be able to recess all version of suppressor or muzzle breaksAvailable Lengths: 10", 12.5", 14.5", 16.5"Inside diameter 1.6 in-M-Lok Compatible mounting system-Free Float Hand Guard-Durable 6061-T6 Aircraft Aluminum-Steel Barrel Nut and Locking System-Hard Coat Anodized Finish-Recess All Version Of Muzzles and SuppressorsCompatibility: Compatible with standard Mil Spec Uppers, ARCompatible paintball gun without needing adapter: 468, PTR, T15, M5, CQMFCompatible paintball gun needing adapter: M17:M17 Barrel Nut Tacamo Bolt, Vortex, Tippmann A5, BT Combat: Tacamo Bolt & Vortex Barrel Nut Tacamo Blizzard: Blizzard Mil-Spec Nut Package includes:1 x Handguard1 x Barrel nut