Moriarti AR-15 16" 300AAC Blackout MA-300 Semi-Auto Rifle with Mag

The Moriarti MA-300 AR-15 rifle chambered in 300AAC Blackout is a reliable and versatile firearm platform designed for performance, accuracy, and modularity. Whether you're building a tactical loadout or hunting setup, this AR-15 chambered in 300 Blackout delivers proven performance with quality components and precision engineering.

Featuring a 16” 4150 CMV barrel with a 1:7 twist rate, this rifle is optimized for subsonic and supersonic loads, making it ideal for suppressed or unsuppressed shooting. The 15” M-Lok free float rail provides ample space for optics and accessories, while the forged upper and lower receivers ensure durability and a solid foundation for customization.

This AR-15 complete rifle includes a nitride-coated M16 BCG, standard charging handle, and a mil-spec lower parts kit. The LE 6-position stock allows for quick length-of-pull adjustments. The rifle ships with a standard AR-15 magazine (30-round or 10-round, depending on your state laws) and is ready for action out of the box.

Features:

• Caliber: 300 AAC Blackout

• Barrel: 16” 4150 CMV, 1:7 twist, threaded 5/8x24

• Muzzle Device: A2 flash hider

• Gas System: Carbine-length stainless steel tube with .750 low-profile gas block

• Handguard: 15” M-Lok slim-profile free float rail

• Upper Receiver: Forged, flat top, includes forward assist and dust cover

• BCG: M16, case-hardened 8620 steel, nitride coated, mil-spec and MP tested

• Charging Handle: Standard AR-15, mil-spec

• Lower Receiver: Forged Moriarti Arms lower with tension adjustment screw

• LPK: AR-15 mil-spec lower parts kit

• Buffer Assembly: Standard weight buffer, spring, and castle nut

• Stock: LE 6-position mil-spec adjustable buttstock

• Magazine: Includes 30rd or 10rd AR-15 mag (based on shipping state restrictions)

This 300AAC Blackout AR-15 rifle is a great choice for shooters seeking a balance of compact power and versatility in a lightweight semi-auto platform. Perfect for home defense, range training, or suppressed operation.

FFL transfer required. Ensure your receiving dealer submits a valid copy of their license referencing your order number.

Looking for more caliber options? Explore our selection of AR-15 rifles and uppers to find the configuration that meets your mission.