AR-15 300 AAC BLACKOUT 16" Stainless Steel Diamond Fluted Upper Receiver

Product Code: MA300AAC16-DMD
In Stock
Price: $399.95$429.95

Available Options

Lower Parts Kit:

Add BCG:

Add Charging Handle:


  • Buffer Tube - Commercial or Mil Spec? Sep 28, 2015 Of all the parts of an AR15, the one part that is not standardized is the buttstock buffer tube. At first you would think the difference is just the diameter..

AR-15 300 AAC BLACKOUT 16" stainless steel diamond fluted upper assembly. This is a perfect upgrade to your AR-15 Rifle. 300 blackout caliber uppers use your standard .223/5.56 bolt carrier groups and magazines! No special bolts or magazines to buy to get into a new caliber!

  • Barrel - 16" 416 stainless steel hbar contour barrel. Hardened to 26-32 rc and stress relieved. Chambered in 300 blackout. 1-7 rh twist. Button rifled. .750 under gas block. Diamond fluted. 5/8-24 threads completed with stainless steel x-treme muzzle brake and crush washer. M4 feedramps.

  • A3 flat top upper reciever - made from certified 7075-t6 aluminum forgings. Black hardcoat anodized to gov. specs. Forward assist and dust cover installed. M4 feedramps.

  • Gas system - .750 low profile gas block made from aircraft quality aluminum and black hardcoat anodized. Carbine length gas system.

  • Handguards - mid-length free floating slim keymod rail. Made from aircraft quality aluminum and black hardcoat anodized. Keymods may vary in design, depending on stock availability, the same excellent quality.

Upper assembly does not include BCG and Charging Handle. Make it a complete rifle with additions on top of this page.

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