KWA Full Metal KM4A1 / M4 Carbine Airsoft AEG Rifle (Package: Add 7.4V 20C 1300mAh LiPo Battery + Charger)

"does this have a 14mm anti-clockwise barrel thread?

"Had this gun for three weeks - used it for two short optic zeroing sessions. First session went fine - but on the second shooting session the gun would not fire. There was no noise, clicks, or anything from the gearbox. Also, the fuse kept blowing when attempting to fire it. I replaced the fuse but no luck. Evike brought it in for RMA and said the motor was bad. How did a motor go bad on a gun with fifteen minutes of shooting time? This makes me question the reliability of the rifle.