Features:Purpose built for 3-Gun and practical rifle competition the M153GN18's are ready to dominate right out-of-the-box. A Timney 4-lb. single-stage trigger and Ergo wide grip come standard. The light weight MBA-1 buttstock features an adjustable cheek piece and length-of-pull. The factory ambidextrous safety and Raptor charging handle provide ease of operation for all types of shooters. This rifle is highly customizable with an adjustable gasblock and tunable muzzle brake to give the user the opportunity to tune the rifle for specific purpose or ammunition.Specifications: PRODUCT LINE: M-15 CALIBER: .223 Wylde | .223 Rem | 5.56x45 BARREL: HB Match Grade Stainless Steel BARREL LENGTH: 18" TWIST RATE: 1:8RH MUZZLE DEVICE: Armalite Tunable Competition Muzzle Brake FRONT SIGHT BASE: 2" MIL-STD 1913 Rail Section HANDGUARD: 15" Free-Floating Tactical ATTACHMENT METHOD: Key-Mod STOCK: MBA-1 Light Weight Precision Adjustable UPPER RECEIVER: Forged Flat-Top with MIL-STD 1913 Rail 7075-T6 Aluminum LOWER RECEIVER: Forged 7075-T6 Aluminum SAFETY: Ambidextrous TRIGGER: Timney 4-lb. Single-Stage Trigger CHARGING HANDLE: "Raptor" Ambidextrous FINISH: Hard Anodized Aluminum Manganese Phosphated Steel OVERALL LENGTH: 39.5" Collapsed | 40.5" Extended WEIGHT: 7.8lbs INCLUDED: One 30-Round Magpul PMAG Owner's Manual WARRANTY: Limited Lifetime Warranty