Stag 15 Tactical 10.5 Pistols are chambered in 5.56 NATO and built around a 10.5 1/7 twist barrel M16 Bolt Carrier Group Stag 9 M-LOK SL Gen 2 Handguard and 7075 T6 Aluminum Receivers. These pistols have an SB Tactical SBA3 Pistol Brace and a carbine-length gas system that is combined with a low-profile gas block which provides reliability under any condition. - The free-floating Stag 9 M-LOK SL Gen 2 Handguard features a slim lightweight profile that offers increased ergonomics maximum airflow and modularity while continuing to provide the utmost strength and durability. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights optics and accessories the shooter may require. - Weight: 5.5 lbs - Length: 26.25 collapsed 29 extended - Action: Semi-Auto Direct Impingement - Caliber: 5.56 NATO - .223 - Twist Rate: 1/7 Button Rifled - Muzzle Device: A2 Flash Hider - Barrel: 10.5 4150 CMV Black Nitride - Handguard: Stag 9 M-LOK SL - Receiver Material: Forged and Mil-Spec 7075 T6 Aluminum with Type 3 Hard Coat Anodize - Bolt Carrier: Mil-Spec Black Nitride or Phosphate coated M16 BCG - Gas System: Carbine-Length with Low Profile Gas Block - Charging Handle: Standard Mil-Spec - Brace: SB Tactical SBA3 Pistol Brace - Buffer: Heavy Buffer - Trigger: Mil-Spec Single Stage Trigger with Enhanced Trigger Guard - Grip: Magpul MOE SL Grip - Magazine: Magpul PMAG - Safety Selector: Right Hand or Left Hand