I got my self a KA m4a1 yesterday
i pulled the upper receiver off so that i could add some quick disconnects for the plug for easy dis-assembly, i also removed the the dummy bolt to make work easier.
now im trying to but the upper back on and it wont seat back all the way in?
any one got the same issue?
that is as close as i can get it any and all help would be greatly appreciated
i have had 2 m4s before one a tm and the other a Dboys and they all went back together no problem but this one i cant figure out