Great Lakes Firearms and Ammunition GL15 Features The Great Lakes Firearms GL15 is built around a 7.5 416R stainless steel barrel cut with a 1:8 twist to stabilize a wide range of 5.56 / .223 Rem loads giving shooters flexibility in ammunition choice. The barrel is threaded 1/2x28 and fitted with a forward-tightened muzzle brake to help control recoil and muzzle rise during rapid strings of fire. A direct impingement gas system running through a .750 gas block keeps the action cycling reliably while M4 feed ramps on the forged aluminum upper smooth out feeding from the included 30-round magazine. The mil-spec trigger breaks at a consistent 5.5 to 6 lbs giving a predictable press for both range and defensive work. The billet 7075 aluminum lower and upper receivers wear a Blue Titanium Cerakote finish that gives the pistol a distinctive look while delivering Cerakote s durability against wear and the elements. A 7.125 M-LOK handguard with a full top Picatinny rail keeps the profile slim for one-handed maneuvering while leaving room to mount a light sling point or foregrip. The adjustable five-position Ace of Brace pistol brace lets shooters set the length that fits their build and the mil-spec polymer grip keeps the overall package light at just 5 lbs. With no iron sights included the top rail is ready to accept a red dot or magnified optic straight out of the box making the Great Lakes Firearms GL15 Blue Titanium a compact capable AR pistol platform. Great Lakes Firearms and Ammunition GL15 Specifications Manufacturer: Great Lakes Firearms Model: GL15 Caliber: 223 Wylde (5.56 NATO / .223 Rem) Capacity: 30+1 Barrel Length: 7.5 Barrel Description: Threaded Stainless Steel Twist Rate: 1:8 Thread Pattern: 1/2x28 Handguard: M-LOK Full Top Picatinny Rail Receiver Finish: Blue Titanium Cerakote Receiver Material: Aluminum Optic Footprint: Picatinny Rail Stock Description: Ace of Brace Pistol Brace Grip: Mil-Spec Polymer Trigger: Mil-Spec 5.5-6 lb pull Sights: None Overall Length: 23.5 Weight: 5 lbs Available At: GrabAGun