This GLOCK 17 Gen5 airsoft pistol faithfully replicates the same features externally as the firearm. This 6mm airsoft BB pistol works with green gas and fires with a crisp, fast cycle. The G17 Gen5 GBB model officially licensed by UMAREX works with many aftermarket accessories designed for GLOCK pistols such as gun lights, holsters, etc. This Gen 5 GLOCK features the latest power system valve which provides incredible recoil impulse, easy to adjust hop-up, and efficient use of the green gas!