An honest review by 4UAD Smart Airsoft on the Kingdom Tech Tec 9 Gas Blowback SMG. Watch the video to understand why it could be better. Built like its namesake, the KTC TEC-9 gas airsoft pistol boasts a sturdy steel and nylon construction with a rapid-fire aluminum bolt, open bolt action for realism, and adjustable hop-up for accuracy, all neatly packed in a select-fire semi and fully automatic package.