m0rp

With a barrel 14 cm longer than an m4, is it possible that suction is playing a factor in reducing the velocity? Might be interesting to compare the volume of the piston immediately before release to the total volume of the barrel. I would expect TM or such not to overlook this but Academy don't know. It might be possible/desirable to shave the inner barrel down a bit inside if that ratio were bad. 'Course if yer planning on gutting it anyway.... Very nice review! m