Quote:
Originally Posted by hongkong100
toptech m4 is still electric blowback not gas so i wounldn't get the toptech just because its new and 99.9% of all gbb rifles are lemons or in instauka missing parts  go with g&g r4(m4) |
I know it's not gas. But it does use a air piston right? So it shouldn't have an effect on the gearbox, only that there is a piston on the top of the gearbox.