The 16” DPMS GII AP4-OR (Optics Ready) Carbine is the perfect do it yourself 308 Modern Sporting Rifle. With the A3 Mil-Spec height upper and same plane steel gas block it’s ready for any kind of optic and or iron sight combination. The AP4-OR may be simplistic but it’s still has all the innovation and reliability of the Award Winning GII Platform that has changed the standards for 308 MSRs.