Kizuna Works Lower Frame Set for BSK43 Gas Blowback Airsoft Pistol, OD Green

Your BSK43 lower frame cracked, the magazine release went soft, or you're just tired of the factory colour. This Kizuna Works lower frame set is the replacement, in OD Green polymer, built specifically for the BSK43 Gas Blowback platform.

The lower frame is the main structural body of the pistol. It holds the grip, triggers the firing mechanism, and receives the magazine. When it breaks or wears, you need a direct replacement—not a universal part that needs filing down to fit.

This is a replacement part, not a complete pistol. It does not fire on its own and is not sold as a standalone GBB. It's designed to be fitted onto an existing BSK43 build or swapped into a repair. You'll need the upper frame, internals, and all the gas system components from your current pistol.

OD Green polymer, made to factory tolerances. Kizuna Works parts are known for tight fit on their own platforms. Installation is straightforward if you have the right screwdrivers and patience—take photos before you disassemble your current setup so you can reassemble in the right order.