Originally Posted by
jcote258
Sure, just from shooting both in a full auto/select fire setting. Unsuppressed, a piston will keep a majority of the grim out of the tight tolerant upper receiver also known as the not shitting where you eat saying, where as the DI sprays carbon into the upper receiver and buffer tube. This is obvious and nothing new here. When shooting suppressed full auto either piston or DI, back pressure from the suppressor blows back over the bolt once disengaged and leaves "streaks" of carbon all over the side of the BCG. Also on clean up, carbon from the piston rifle made its way into the buffer tube, lower receiver, and optics.
After about 500 rounds of shooting select fire with a suppressor, the piston showed a slower cyclic ROF and you could hear the BCG "grinding" in the upper receiver from the carbon replacing lubricant but continued to fire in semi.
The DI weapon also began to show the same symptoms but only after about 250 to 300 rounds. Where carbon blows back the BCG and back pressure release into the upper receiver, is seems you get almost twice as much carbon in the upper receiver than piston system. Does this make a DI system inferior? Absolutely not, the DI system is tested proven system and continues to perform, hence the still current use in current military.
One of the guys that tunes weapon systems (polished triggers, custom machining, ect..) swears by the DI if running full auto, I personally like piston. Both are great weapons, DI has a better chance of becoming up and running if failure is evident for parts reason where as failure is only a matter of being made by man so its not a matter of if but more a matter of when. Personal preference is bottom line, and back to the topic, save your money and keep the 11.5, my 10.5 (piston and DI) are fun as hell but you won't notice any gain with an inch. Take care.
Jon
Reply With Quote
Bookmarks