Features:With its 16" barrel at the heart of its design this rifle blends rugged durability with exacting precision. The tactical handguard's slim octagonal profile sports a full-length MIL-STD 1913 12 o'clock rail for sights and accessories. The adjustable gas block allows the user to tune the rifle for their preferred ammunition and/or suppressor use. Like all tactical series rifles it comes standard with Magpul MBUS flip-up sights.Specifications: PRODUCT LINE: M-15 CALIBER: ..223 Rem | 5.56x45 BARREL: HB Double Lapped Chrome Lined/Chrome Moly Vanadium BARREL LENGTH: 16" GAS SYSTEM: Mid Length Adjustable Gas Block TWIST RATE: 1:7RH MUZZLE DEVICE: Flash Suppressing Compensator FRONT SIGHT BASE: Full-Length MIL-STD 1913 Rail HANDGUARD: 15" Tactical ATTACHMENT METHOD: Key-Mod STOCK: Magpul STR Multi-Position Collapsible UPPER RECEIVER: Forged Flat-Top with MIL-STD 1913 Rail 7075-T6 Aluminum LOWER RECEIVER: Forged 7075-T6 Aluminum SAFETY: Ambidextrous TRIGGER: Two Stage Precision CHARGING HANDLE: "Raptor" Ambidextrous FINISH: Hard Anodized Aluminum Manganese Phosphated Steel OVERALL LENGTH: 33.3" Collapsed | 36.6" Extended WEIGHT: 7lbs INCLUDED: One 30-Round Magpul PMAG Owner's Manual WARRANTY: Limited Lifetime Warranty