Manufacturer: RRA Rock River Arms
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Rock River Arms 9mm Pistol Length A4 Complete Upper Half AR15 RRA
So you want to make an AR-15 pistol that uses less expensive handgun 9mm Parabellum rounds? It’s about time, everyone is doing it. It’s a very simple process, we’ll go through the steps here. It's easy, quick and very cool. Lower is not included and shown for example only. This is the complete upper only. For pistol and SBR applications only, all NFA rules apply.
Can I switch between my AR15 pistol upper and this one easily?
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