G&G has introduced its new STP45 CO2 blowback pistols which are Hi-Capa style replicas, available in various configurations including polymer and CNC-milled aluminum slides, boast a realistic blowback action and a proprietary PAI hop-up system that allows for precise adjustment (up to 39 clicks) and the ability to lift heavy BBs (up to 0.40g). 

Toronto Airsoft's video review showcases the G&G STP45 and STP45 Pro GBB pistols, highlighting their features like the patented PAI hop-up system capable of lifting heavy BBs, adjustable hop and trigger sensitivity through the trigger guard, optics-ready slides, and compatibility with aftermarket parts, with the Pro model boasting a metal slide and the standard version a polymer slide, both offering robust construction and unique reloading features.