Double Stack Series pistols come standard with our premium lockable hard case, two magazines, cleaning kit, bushing wrench, trigger lock and instruction manual. LENGTH: 7.9″ HEIGHT: 5.76″ WIDTH: 1.5″ WEIGHT: 29.9 OZ (UNLOADED) ACTION: SINGLE ACTION SAFETY: AMBI THUMB & GRIP SAFETY Tisas 1911 Double Stack Series Pistols are compatible with Tisas® Double Stack, Military Armament Corp.™ and other STI 2011™ Magazines. Optics Mounting Info: Direct Mount for Holosun 507k & RMSc Footprint Optics Factory Sights Lower 1/3 Cowitness with most optics Optic Mount Thread Pattern: M3 x 0.5 Torque Specs Minimum 10.2 in-lb Max 11.9 in-lb Blue Thread Lock or Equivilent w/ breakaway rating of 71 in-lb ADDITIONAL INFORMATION   Caliber: 9MM Barrel Length: 4.25″” 1:10RH Twist Button Rifled Barrel Material/Finish: 4140 Forged & Machined, Hard Chrome Finish Frame Material: Forged 4140 Carbon Steel Slide Material: Forged 4140 Carbon Steel Grip Module: Reinforced Polymer, Glass Filled Trigger: SF Skeletonized Black Finish, 4.75# Pull Finish: QPQ Slide, Cerakote Black (H-146) Frame & Small Parts Front Sight: White Dot, Tisas Dovetail Cut Rear Sight: Serrated Black, Glock Dovetail Optic Mount: 1/3 Co-Witness, Direct 507k/RMSc Footprint, M3 x 0.05 Treads Magazine: OEM Checkmate, 17rd Capacity