Andrew Lai of 4UAD Smart Airsoft upgrades his old Double Bell 1911 pistol with parts from Titanium Tactical Industry (TTI) to fix its poor gas efficiency. He demonstrates the pistol's initial poor performance, which could only fire a few shots before running out of gas. After installing TTI's hop-up chamber, high-capacity magazines, and a zero-friction blowback housing, he tests the pistol again. The upgrades significantly improve the gas efficiency and accuracy, and whilst the muzzle velocity is a bit high. According to him, the TTI parts successfully made the old pistol functional and reliable again.