Rock River Arms 9mm Carbine Length A4 Complete Upper Half AR15 RRA
So you want to make your AR-15 multi-caliber with 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.
Can I switch between my AR15 upper and this one easily?
Yes, You have the ability to switch uppers quickly and easily with this kit. Inspect your existing hammer and compare it with the picture below. If it is the "Sporterized" DPMS non-notched style then your are all set. If not, buy the DPMS hammer-it works well on both uppers. Next, simply push the two upper retaining pins out, swap out your 5.56 and 9mm uppers, insert the magwell block and change your buffer. This normally takes less than 2 minutes.