AR15 Barrel/Receiver Compatibility

308Gunner · November 17, 2011, 11:17 PM

I'm currently setting up to order parts to start putting together an AR15 build. I'm looking at a Rock River barrel and thinking of using a Spike's Tactical upper. According the handy little AR15 chart that circulates out there, I don't think they're compatible; it says the RRA barrel uses 'rifle' feed ramps, while the ST site says their upper has M4 style ramps. I just want to double-check and make sure that these two aren't compatible. And if they're not, can the RRA barrel be made compatible? Either through parts or a gunsmith?

Mobuck · November 19, 2011, 09:01 PM

Got a Dremel?

November 17, 2011, 11:17 PM	#1
308Gunner Senior Member Join Date: March 22, 2008 Location: NY Posts: 199	AR15 Barrel/Receiver Compatibility I'm currently setting up to order parts to start putting together an AR15 build. I'm looking at a Rock River barrel and thinking of using a Spike's Tactical upper. According the handy little AR15 chart that circulates out there, I don't think they're compatible; it says the RRA barrel uses 'rifle' feed ramps, while the ST site says their upper has M4 style ramps. I just want to double-check and make sure that these two aren't compatible. And if they're not, can the RRA barrel be made compatible? Either through parts or a gunsmith? __________________ ‘‘To disarm the people is the best and most effectual way to enslave them.’’ — George Mason

November 19, 2011, 09:01 PM	#2
Mobuck Junior member Join Date: February 2, 2010 Posts: 6,846	Got a Dremel?