"The 300 AAC Blackout cartridge gives performance very similar to the 7.62×39, but in a cartridge that works perfectly with standard AR-15 bolts, magazines and lowers. You can convert any standard 5.56 AR-15 to .300 AAC Blackout by merely changing only the barrel. Of course, if you don’t want to mess with taking apart your current upper, you can just drop a complete 300 AAC Blackout AR 15 Conversion Kits onto your lower."
There are tons of upper sales right now. I have one 5.56 AR any reason not to just get a 300blk upper instead of a entire 300blk rifle?
There are tons of upper sales right now. I have one 5.56 AR any reason not to just get a 300blk upper instead of a entire 300blk rifle?