Is it another .22 caliber or did they give the marines something better to shoot with?
I wouldn’t care if it shot BBs; the question is Does it kill? If it can’t do that as effectively as the heavier gun, it is worthless.
BTW, anybody see “Sons of Guns” show where they converted an M1919 LMG to a shoulder fired weapon - in three days? Maybe the Defense Department should be looking to them for new ideas. Next show is about creating a 1000 yd AK-47!
Oh, oh, but the 5.56 yaws and splinters and hydrostatic shock and..../sarc.
Btw weight, it is another .223.