.300 blackout

I posted a question in the ammo/reloading section which led to this poll. The .300 blackout would be a 7.5” AR, and the .45 acp would be either a PCC or AR with a barrel of similar length. Whatever I end up with will host a Dead Air Primal. I already have .45 stacked pretty deep, but would...

Title says it all. I have a Dead Air Primal in jail and have decided to put together a HD .300 Blackout. It will be suppressed 100% of the time. Given the current state of ammo cost and availability, I’m just looking to give myself the most options. This will be my first time messing with this...

Looking to buy complete upper assembly - BCG, Charging Handle, 16" Barrel, Hand-guard, sites, etc. to convert M&P 15 Sport 2 to .300 AAC. Wanting complete setup so I can go from 5.56/.223 Rem. to 7.62 quick and easy whenever I want to. Any Recommendations for decent parts dealers local or online?