the other thing I wanted to ask
most m4’s you see are m4 style there not real m4’s the real m4 uses a gas piston system that wears out over time due to the fact the piston comes back and opens the chamber before the round has burned completely this can be fixed with a heavy buffer but slows the rate of fire on the other hand the traditional a15 uses a gas tube that feeds spent gas to the bolt carrier to drive it back this system works alot better than anything else anyway what I am getting to is you can buy any rra carbine rifle and thread on an m4 stock just like the one you see in my pictures