Same gun just removed the peripherals, lenghtened the barrel, changed teh muzzle/flash hider, lengtened the stock and the top tactical rail, and gave this bad boy a 30 round drum mag!! =O This lil demon is ready to play splatter with enemies brains.

Again i think the 7.62x51mm is the way to go. Since i believe the sniper version uses that... or they just change out some parts and throw in some fifty cal parts or .338 Lapua magnum parts. -shrugs- Aaaaaanyway its ready for action... =3

Enjoy~