famas double feeding

[beefmagic]

hi all, recently got a TM famas second hand that needed some work, although ive fixed most of its problems i am still getting a double feed every other shot on semi, from what ive seen the gearbox is completely stock and only cycles once on semi and the air nozzle seems to move in the same manner as the v2gb in my CA m41 any, i have tried changing the hop bucking and tested with an Ares, CA and guarder hop bucking with no difference between them.

any help greatly appreciated

[johnnyj]

Re: famas double feeding

my wild guess's , spring in the mags to hard feeding more than 1 bb ? overspin or even windback .

i have never even held a tm famas never mind worked on 1 so i am sorry to say just guess work