MPA .300 Blackout Complete Rifles — 416R Precision Stainless | Spiral Fluted | Sanford, NC
MPA .300 Blackout complete rifles ship ready to shoot — no upgrades needed out of the box. 416R stainless spiral fluted barrel, forged receiver, 3.5 lb single-stage trigger, and muzzle brake all installed and function tested in Sanford, NC. Built to run supersonic and subsonic loads reliably 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. Delivers significantly more energy at short range and runs subsonic loads for suppressed use. If you want a do-everything rifle on the AR-15 platform, .300 Blackout is the logical choice.
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 a complete rifle with a proper muzzle brake and 3.5 lb trigger already installed, .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 Complete Rifles
Moore Precision Arms .300 Blackout complete rifles are built for the shooter who wants a factory rifle that doesn't need immediate upgrades. Every MPA .300 Blackout complete 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.
The MPA .300 Blackout complete rifle is purpose-built for versatility — runs supersonic loads for hunting and general use, switches to subsonic for suppressed operation with no platform changes. A complete rifle that arrives ready to shoot, backed by the MPA Precision Standard lifetime warranty.