MPA .300 Blackout Rifles — 416R Precision Stainless | Spiral Fluted | Sanford, NC
MPA .300 Blackout rifles ship ready to shoot — 416R stainless spiral fluted barrel, forged receiver, 3.5 lb single-stage trigger, and muzzle brake all installed and function tested before they leave our facility in Sanford, NC. Available in 16" barrel configuration, built to run supersonic and subsonic loads from the same platform.
Why .300 Blackout
More versatility than 5.56
Same platform, significantly more capability
.300 Blackout runs in a standard AR-15 with only a barrel swap — same lower, same magazine, same controls. But it delivers significantly more energy at short range and runs subsonic loads for suppressed use. 5.56 can't do either. If you already own an AR-15 or want a do-everything rifle, .300 Blackout is the logical step up.
Better than 9mm for an AR platform
More power, better range, same suppressor capability
Many suppressor owners run a 9mm PCC for quiet operation — .300 Blackout subsonic matches that in suppressed performance while delivering far more energy and range. In an AR-15 platform with a proper muzzle brake and trigger, .300 Blackout is the more capable choice for serious use.
Why MPA
Barrel
416R precision stainless
Better corrosion resistance and barrel life than standard chrome moly — the same steel used in match-grade barrels at twice the price.
Spiral fluted
Standard on every rifle 16" and above
Reduces barrel weight and improves heat dissipation during sustained fire. Most manufacturers charge extra for this. MPA includes it standard.
Trigger
3.5 lb single-stage, included
A $100+ upgrade on most rifles. MPA includes it standard — S7 tool steel internals, no take-up, crisp break, short tactile reset.
Quality
Function tested in Sanford, NC
Every rifle is fired and inspected before it ships. Covered by the MPA Precision Standard lifetime warranty.
About MPA .300 Blackout Rifles
Moore Precision Arms .300 Blackout rifles are built for the shooter who wants maximum versatility from a single AR-15 platform. Every MPA .300 Blackout rifle ships with a 16" spiral fluted 416R stainless barrel, forged receiver, 3.5 lb single-stage trigger, muzzle brake, MLOK split rail handguard, and adjustable stock — all installed, torqued, and function tested in Sanford, NC.
.300 Blackout is uniquely capable of running both supersonic and subsonic ammunition from the same rifle with no changes to the platform — making it the most versatile AR-15 caliber available. Whether you are hunting, running a suppressor, or looking for a reliable home defense rifle, the MPA .300 Blackout delivers. Covered by the MPA Precision Standard lifetime warranty.