Sure, it'll move the bolt carrier, but w/out the proper assist notches cut into the carrier, it won't do much when resistance is applied to the carrier. It needs the carrier notches to be able to rachet the carrier forward. When Armalite came out w/their new A4 AR-10 upper, having a foward assist that worked properly was actually one of their marketing ploys. Maybe DPMS has changed their carriers recently. Mine is almost four years old and has the original chrome carrier. Maybe yours is different. Of course, they all have the Stoner foward assist built into the carrier itself...

ETA: I'm not the best at communication at times. For an example of what I'm try to say, take a flat head screw driver and push on your DPMS carrier at the same angle as the Foward assist hits it. Now take the same screwdiver, at the same angle and push against one of your AR15 carriers that has the forward assist grooves notched into the carrier. Notice the difference?