User blog comment:Heatedpete/Modern Warfare Pack-a-punch/@comment-1944389-20100420184642

Penetrator XC115- Barrett 50 cal with higher bullet penetration, 15 round magazine, higher damage, very slow reloading.

Assassin XXX- M21 EBR with very high penetration, better range, 30 round magazine, less damage, slow reloading, slower fire rate.