Glock 17 gen 4 co2 4.5 mm bb's 1.7 joules July 8, 2019 16 32 64 128 Glock 17 gen 4 bb gun Glock 17 gen 4 co2 air gun Glock 17 gen4 co2 blowback airsoft pistol Bb gun glock 17 gen 4 co2 Glock 17 4.5 mm
