Rainier Arms MK12 223 Wylde Partial Upper Receiver - 18"

Introducing a cloned upper receiver build of the MK12 SPR. Bringing the highest quality parts to the market, while offering the best value as well. This partial upper build utilizes a Precision Reflex GEN III free float handguard and front sight. Pairing up with our forged upper receiver and Ultramatch MOD 2 SPR 18" barrel. Throw in your favorite charging handle and bolt carrier group and you are good to go! Upper Build: Rainier Arms Forged A4 Upper Receiver Rainier Arms Ultramatch MOD 2 MK12 SPR .223 Wylde Barrel - 18" Precision Reflex Inc Carbon Fiber Free Float Handguard - 12.5" Precision Reflex Inc G1 Flip Up Front Sight w/ .750 Crossbolt