The look for the best in realistic officially licensed GLOCK airsoft is over! UMAREX's latest addition to their GLOCK line is the CNC machined slide GLOCK 17 Gen 3. This unique airsoft pistol comes with a 20 round green gas magazine, but it can also work with a (sold separately) 20 round CO2 magazine. The real news with this dual fuel airsoft pistol is the snappy recoil effect made possible in part by the precision CNC machined steel slide. This version launches .20 gram BBs at 315 FPS.