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AR-15 Upper Assembly – .300 AAC Blackout (16″ Stainless Barrel & 13.5″ M-Lok Handguard, 1:8 Twist)

$379.99 $226.84 (You Save $153.15)

Out of stock

Out of stock

Free Shipping on all orders $325+!

SKU: 3001618(SS)-MLOK(135)


Want a fast way to swap your AR’s caliber between your .223 or 5.56mm and the .300 AAC Blackout caliber?  This upper assembly makes it simple.  You just pull out your AR’s takedown and pivot pins pull your upper off, put this one on, and push the pins back in.  Sounds easy, right?  Told ya.

This upper assembly comes you already prebuilt, so you don’t have to screw with any building.  You get a 16″ stainless steel barrel accompanied by a 13.5″ M-Lok free-floating handguard.  All you need to add are back up sights or an optic of your choice.


Gas System: Pistol-length
Barrel Profile: M4
Barrel Steel: 416R
Barrel Finish: Stainless
Chrome Lining: No
Muzzle Thread: 5/8×24
Chamber: .300BLK
Twist Rate: 1:8
Barrel Extension: M4
Gas Block Size: .750″
Gas Block Type: Low-profile
Muzzle Device: A2 Flash hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: 13.5″ lightweight M-Lok free float
Bolt Carrier Group Included: Yes
Bolt Steel: 9310 steel, magnetic particle inspected
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 24.5″

Benefits of the 16” Pistol-Length Parkerized AR 15 Upper Assembly:

  • 100% legal to own and ship to your front door
  • Not considered a firearm – no FFL paperwork needed!
  • 4140 steel barrel and Freedom parts kit ensure sub-MOA accuracy
  • Prebuilt upper with gas system removes the guesswork of rifle making

No FFL required Made in the USA Lifetime Warranty

Shipping Restrictions only ships within the United States. Federal legislation dictates we cannot ship our products internationally. Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website.
We try our best to keep our shipping page current, but laws change daily. 

AR-15 Upper Assembly – .300 AAC Blackout (16″ Stainless Barrel & 13.5″ M-Lok Handguard, 1:8 Twist)

$379.99 $226.84 (You Save $153.15)

Out of stock

Out of stock

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Free Shipping on all orders $250+!


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