21tech GIII is a ar-10 (.308) style rifle that takes G3/ptr mags and a mlock handgard 

what's included:

9 aluminum g3 mags

Pined dead air muzzle break

vortex strike eagle first focal plan 1-8x24 lpvo

B5 carbin stock

Daniel defense ar-15 grip

16" barrel with a adjustable gas block with less than 400 rounds through 

radiant charging handle

mlock magpull bipod

mlock magpull vertical grip