AGM m4 ggbr firing mode problem
 

hi guys !
I upgraded this gbbr with a lot of parts, but the problem here is in the lower for sure. All the internal in the lower was upgraded almost with G&P parts (hammer, sear, bolt catch, anti-rotation link) and reinforcement springs and pins from element.

Since I changed all my parts, everything was fine except few small adjustments but nothing big enough to stress out. But lately, I was testing my m4 to see if it would be ready for my next game which is next Tuesday and :
*HERE is the problem :
AT SINGLE FIRE MODE, it shoots one bb when I press the trigger, and when I release it, it shoots again another bb, feels like it s burst haha. :confused: anyways, in full auto it's all good and shoots like if there's no problem at all. I know it might just be a little stupid problem, but if someone knows or experienced this, plz let me know what to do.

till then, I ll try my best to get through this problem by myself

thx

Had the same problem. Sounds like your trigger is worn out, buy a new steel one to replace it.

thanx, I ll check that out tonight

Basically the top front edge of the trigger where the hammer catches when it's cocked should be rounded/worn. I installed a steel Element trigger and it now fires reliably on semi automatic.

I just ordered a new one made out of steel. Mine was worn out like you said. cheap metal is the only thing to say here.

Thx for the help