I’m no AR expert, but I believe DPMS is one of the older AR manufacturers. My training replicas (airsoft) are DPMS panthers.
I have a question. If you were involved in the making of a low-budget film... like perhaps “Sharknado” - lol.... would you use airsoft guns and simply not show the end of the barrel on screen (pretty cheap, right?) or use a real gun in front of a blue screen and splice that in with the proper scenery in the background?