ARD AR15 Depot stocks top grade AR15 Parts, AR15 Barrels, AR15 Upper Receivers, AR15 Accessories, AR15 Handguards, AR15 Stocks, AR15 Buffer Tube Kits, AR15 Lower Parts Kits and more. AR15.com is a firearm-enthusiast web forum founded as a mail list in 19
upper is compatible with multiple AR-15 calibers, including .224 Valkyrie, 6.5 Grendel, .300 Blackout, .223 Remington, and 5.56x45mm NATO receiver. However, due to the size of the ejection port, it cannot accommodate rounds such as .458 SOCOM or .450 Bushmaster. This is the kind of ...