bought a m16a2 light machine gun upper a little while back and considered trading it and still might, but decided to go out and shoot it today.
put right at 100 rounds threw it and it shoots pretty nice. used just ball ammo and after getting it sighted in fired it slow and fast, amazing.
have it on a pre-ban ar15 lower with all ar15 carrier in it.
all it did was rock back on the bi-pod a little and if you pulled the trigger as fast as you could at 100 yards all the shots stayed with in a one foot area.
have the an/pvs2 night scope and will go out some night and see how it works at night. also have the vortex flash hider to put on it.
man that thing eats up a 30 round mag as my self I do not think I have ever fired a semi- auto rifle except a .22 that kept it on target like that. nice anyone else shoot one before?