After the M120 spring (with stock barrel), I was piercing cardboard, and able to make a circle cutout on full auto (by spraying).
After M120 spring and tightbore, I'm not only piercing paper, and just leaving an imprint on the cardboard.
Obviously I did something wrong with the tightbore swap.
I'm thinking something with the bucking, I may have pinched a few holes into it..
With a Prometheus Tightbore @ 6.03mm and Prometheus M120 spring, what kind of bucking should I be purchasing?
Any help would be greatly appreciated.
Stock hop-up (however if needed, could upgrade..rather not)
This is on a KWA M4 CQB model, with a 363mm barrel (barrel extension)
Edited by rawfuls, 29 June 2013 - 04:35 PM.