The USPSA (Double Stack)
Built on the patented modular steel frame with polymer grip, the USPSA Double Stack delivers the traditional features of a 1911 and allows the added benefit of high capacity magazines. The innovative frame design preserves the 17° angle of the grip in relation to the slide, original to the 1911. The essential design element for high capacity, the polymer grip, allows for double stack magazines without over-sizing the circumference of the grip, which remains comparatively the same as the circumference of a 1911.
This pistol couples STI’s patented receiver with all the most desirable accessories in a factory firearm. The controls are STI International’s stainless steel ambidextrous thumb safeties and knuckle relief high-rise beavertail grip safety. The full length forged stainless steel barstock slide features STI’s unique saber tooth rear cocking serrations, custom USPSA engravings, and is Tri-topped to reduce weight and felt recoil. The barrel is a 5.0″ fully ramped, fully supported bull barrel. This excellent firearm comes standard with an STI square hammer, Recoil Master, patented STI trigger system, STI S-7 sear, and titanium strut for smooth, reliable function. The USPSA Double Stack has black inlayed engraving on the polished sides of the two toned blued/ stainless steel slide, stainless steel magwell, and an STI adjustable rear sight.
The USPSA Double Stack has a two toned blued/stainless finish.
|Calibers||.45 ACP, .40 S&W, 9×19, .38 Super|
|Frame||STI Patented Modular Steel (Long Wide)|
|Grips||Black Glass Filled Nylon Polymer
with Stainless Steel Magwell
|Slide||Unique, Tri-Top, Stainless Steel with
STI Sabertooth Cocking Serrations
|Trigger||STI Long Curved Trigger|
|Barrel||5.01” STI Bull Barrel, Ramped, Fully
|Safeties||STI High-Ride Beavertail Grip Safety
Ambidextrous Thumb Safeties (Stainless)
|Guide Rod||STI RecoilMaster|
|Sights||Dawson Fiber Optic Front (.100)
STI Adjustable Rear
|Weight||40 S&W= 38.3 oz (1086.69g)|
|Finish||2 Toned Stainless Steel Slide, Blued with
Sides of Slide Polished, Frame Blued
|Special Features||Blended Magwell|
|Single Sided Thumb
|9×19, .38 Super||17+1||20+1||26+1|