RRA CMPLT MID A4 UPR 450BM 16″ 5RD

Rock River Arms A4 mid-length upper comes chambered in .450 Bushmaster with a 16″ chrome moly 1/24 twist barrel. Additionally this upper includes a RRA 13″ M-Lok compatible lightweight free float rail and a RRA Operator Brake (5/8-32 thread). This is a complete upper with bolt carrier group, charging handle assembly and a 5 round magazine.

Why Choose PMA Customs?

• Curated Parts: Every component in a PMA firearm undergoes rigorous inspection and testing. With over a decade of experience, we meticulously select and integrate only quality parts, ensuring unparalleled reliability when it matters most.
• Quality Without Markup: We leverage our manufacturing capabilities and reputable sourcing to deliver exceptional firearms without unnecessary markups. Each product is hand-assembled with stringent quality checks at every stage, guaranteeing superior craftsmanship.
• American Made & Veteran Owned: As a Veteran Owned and Operated business, all PMA Customs firearms are proudly built and assembled in our Georgia facility, utilizing components made here in the USA.

Warranty: All Pickett’s Mill Armory firearms, assemblies, and components are backed by our limited lifetime manufacturer’s warranty!