引用:
原帖由 edison0918 於 29-8-2010 20:04 發表
I got the RA-tech hardkick kit and SD rocket valve installed....recoil wise, it's better and more solid since the hardkick kit adds more weight to the bolt carrier....
Installation was pretty simpl ...
thank you very much~~~i will buy that too for sure
where did u buy that?
by the way is the rate of fire reduced too?