Based on 5-star reviews alone, no other handguard comes close. But reviews don't tell the whole story. Made with a rugged design, rock solid locking mechanism and incredibly simple installation, there's a reason why STNGR handguards are regularly trusted by Police, SWAT, competition shooters, shooting instructors, home defenders and tens-of-thousands of STNGR customers. Specifications for STNGR VYPR M-Lok Free Float Handguard for AR15/M4: Manufacturer: STNGR Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Gun Rail: M-LOK Included Accessories: Standard Inner Diameter: 1.35 in Mount Type: M-LOK Quantity: 1 Features of STNGR VYPR M-Lok Free Float Handguard for AR15/M4 Incredibly simple installation. The VYPR, with its simple non-timing barrel nut, was engineered to be the easiest handguard to install on the market. Perfect for first time builders and seasoned gunsmiths alike. No hassle, no frustration, no previous experience required. Simple. Locking anti-slide plate. The VYPR solves a problem that plagues most rails on the market - handguard sliding. With their proprietary anti-slide plate that interfaces with a groove in the barrel nut, the VYPR is locked to the upper - ensuring that it won't go anywhere. Anti-rotation tabs. Forward sliding is a problem that's solved with the anti-slide plate, but what about lateral rotation? The RPTR has built in anti-rotation tabs to prevent any kind of rotation. By combining the anti-slide plate and anti-rotation tabs, the result is a rock solid fit - no matter how hard you run it. Lightweight, increased ventilation. Aggressive machining cuts throughout the rail serve 3 critical functions: 1) Significantly slash excess weight 2) Increase ventilation to cool both your handguard and barrel 3) Steep angles prevent fingers from sliding into grooves. Package Contents: STNGR VYPR M-Lok Free Float Handguard for AR15/M4 Standard