Airsoft Canada - View Single Post - Tanio Koba / KJW M4 GBBR Basic Information and FAQ

beanie · July 2nd, 2011, 02:31

I'm having my first issue with my gun. In full auto mode it will shot once or twice and then the trigger locks just like when you dry fire (the bolt carrier always closes). If I cock it again it will fire 1 or 2 shoots and then lock again. The gas pressure in the magazines is high.
In semi SOMETIMES it shoots about 6 shots (each shot weaker than the last) then locks. After I cock it again it will shoot, the first shot will be strong then the rest weaker kind of like when it cycles it doesn't collect more gas, only when I pull the cocking handle does it have a strong shot. Sometimes it will only shoot 1 shoot per cocking in semi.
Also I can feel a spring vibrating when the gun locks.
Any clues?:banghead:

UPDATE: The exact symptoms are the bolt carrier stops working after the first shot and doesn't slide. If a BB does shoot out on the 2nd and 3rd shot it's from the remaining gas in, I think, the receiver. Same problem in semi and full.

July 2nd, 2011, 02:31	#480
beanie Trader rating Join Date: Apr 2011	I'm having my first issue with my gun. In full auto mode it will shot once or twice and then the trigger locks just like when you dry fire (the bolt carrier always closes). If I cock it again it will fire 1 or 2 shoots and then lock again. The gas pressure in the magazines is high. In semi SOMETIMES it shoots about 6 shots (each shot weaker than the last) then locks. After I cock it again it will shoot, the first shot will be strong then the rest weaker kind of like when it cycles it doesn't collect more gas, only when I pull the cocking handle does it have a strong shot. Sometimes it will only shoot 1 shoot per cocking in semi. Also I can feel a spring vibrating when the gun locks. Any clues?:banghead: UPDATE: The exact symptoms are the bolt carrier stops working after the first shot and doesn't slide. If a BB does shoot out on the 2nd and 3rd shot it's from the remaining gas in, I think, the receiver. Same problem in semi and full. Last edited by beanie; July 2nd, 2011 at 18:06..