Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver

Introducing the RUC PRO MK1 Partial Upper. Bringing the highest quality parts to the market, while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas block on our new and improved Rainier Arms Select barrel. Pairing up with new PRO series MK1 handguard to provide shooters with a rock solid handguard that can take any abuse. Throw in your favorite charging handle and bolt carrier group and you are good to go! 10.5" Upper: Rainier Arms Select 5.56 NATO Barrel - 10.5" Rainier Arms Forged Upper Receiver Rainier Industries PRO Series MK1 Handguard - 9.55" Rainier Arms Low Pro Gas Block - .750" (Non-adjustable) (Gasblock pinned) Rainier Industries .223/5.56 Flash Hider - 1/2x28 Carbine Gas Length Weight: 2 lbs 14 oz 11.5" Upper: Rainier Arms Select 5.56 NATO Barrel - 12.5" Rainier Arms Forged Upper Receiver Rainier Industries PRO Series MK1 Handguard - 11.7" Rainier Arms Low Pro Gas Block - .750" (Non-adjustable) (Gasblock pinned) Rainier In