Take your pick or just take both to fit your needs for a carbine length X2 for outdoor games or the compact X1 one for CQB, Evike.com give their take on the APS G-BOX CO2 Blowback Series. The APS G-BOX gas blowback gearbox system is a high-quality, full-metal construction that is compatible with AEG components such as the receiver, handguard, stock, pistol grip, fire selector, magazine release, and charging handle. It features an ambidextrous selector switch and magazine release, an M-LOK handguard for accessory attachment, a top 20mm/1913 Picatinny RIS for optics, a rear QD sling swivel for retention, a new design hop-up with TM-compatible bucking, and 30 round CO2 powered magazines for reliable operation. The speed draw buckle mount allows for belt line retention and it comes with a limited edition APS mug featuring their best airsoft rifles.