A quick presentation by Bomb Up Airsoft of the G&G GTP-9 GBB Pistol that they have available... "We have a fully ambidextrous GBB pistol which isn't a HK design, and it doesn't just look great, but also has some G&G intelligence inside too. Featuring G&Gs now-usual 'Whirl' valve, which spins when fired to break up any ice deposits inside the nozzle. The Whirl Valve helps to improve your pistols performance in cold weather (especially when you get trigger happy).

Another great feature of this GTP-9 airsoft pistol is its very unique external HOP adjust, which means you don't need to remove the entire top slide to make HOP adjustments. This makes fine-tuning a simple task and adds to the experience. All you need to do is use the included tool, which has its own little compartment inside the pistol grip. Simply remove the tool and insert it into the muzzle to make adjustments. By turning the key, you are pulling the inner barrel tighter into the outer barrel, which presses onto the HOP rubber."