Ahjae TV reviews the Tokyo Marui Sig P320 Gas Blowback (GBB) handgun, a full-size replica of the firearm that inspired the US military's M17/M18 sidearm. The most notable feature of this model is the incorporation of a detachable Fire Control Unit (FCU), which is modular and engraved with a unique serial number, faithfully mirroring the real steel version. Internally, the design uses an under-hammer system to optimize space and includes a large 15mm piston, which contributes to its performance and efficiency.

He praises the handgun's excellent exterior realism and detailing. It features a reinforced resin slide, separate component sights and extractor, and an ambidextrous manual safety. The ergonomic grip is also highlighted for its realistic anti-slip textures and solid feel. Overall, the P320 is commended for its satisfying, smooth slide action and strong gas blowback effect, giving it a powerful presence in the hand.

A major drawback that he noted is the use of Tokyo Marui's older, Glock-style hop-up system. This system is a point of contention for users as it can lead to BB deviation over prolonged use, a design choice the reviewer hopes will be addressed in future models. For users looking to maximize performance, Ahjae TV strongly recommends purchasing and using the optional long magazine, which significantly improves gas efficiency and overall cycling action compared to the standard short magazine.