Mark 2 Complete Uppers

$856.01 – $951.01

Barrel Length
Upper Color

The overall length must meet 16in. You are responsible for any NFA requirements. NOTE: The Blackout Defense Keymo and Surefire muzzle devices are long enough to reach an OAL of 16” on a 13.9” barrel. It is the customer’s responsibility to choose the appropriate muzzle device for their pistol, rifle, or SBR build.

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Mark 2 Complete Uppers

You’re well on your way to a better build with the Blackout Defense complete upper. The upper receiver and handguard are precision machined to achieve perfect alignment, giving a monolithic-like appearance. And with the alignment pins, you get a boost of structural integrity as well.

Upper Receiver

The upper receiver is machined from Aerospace Grade Aluminum with enhanced walls for greater rigidity and structural integrity – all while keeping a low profile. It features two anti-rotation holes that align precisely with our handguard. What you’re left with is a monolithic-like style and design with an extremely robust upper/handguard combination.

The dust cover often goes unnoticed in an AR-15. Not to us. The dust cover is fully contained within the upper receiver. We don’t rely on a C-clip to keep everything in place. Instead, the dust cover hinge pin is held in place by the barrel nut, ensuring nothing comes loose during operation. Due to the variation of dust cover manufacturers and their loose tolerances, we’ve machined a very thin locking groove in the upper receiver. This allows the ball detent of the dust cover to “cut” its own channel in the upper receiver, ensuring a positive, audible lock up and exact alignment.

Handguard

Our handguard brings the full package together with its monolithic-like style when paired with our upper. Like to accessorize? Our handguard gives you five sides of M-LOK compatible mounting slots with a full-length Picatinny top rail. The hand deburring process we put our products through ensures a smooth finish throughout. And for style-conscious people, our barrel nut is hidden to provide an even cleaner look.

Barrel

The Performance Series barrels start with premium 416-R stainless steel bars that are gun-drilled and reamed at standard production speeds in 5R rifling and 1:8 twist. The blanks are then fully stress-relieved and precision air gauged before profiling, threading, and chambering begin.

Our barrel profile features strategically placed linear expansion rings that control the heat growth of the barrel during heavy use. These unique design features, coupled with our adherence to improved machining tolerance standards, result in straighter bores, a superior finish, and improved accuracy.

The gas system for our 13.9″, 14.5″, and 16″ barrels is mid-length.  The gas system for our 11.5″ barrels is carbine.

Bolt Carrier Group

The Blackout Defense bolt carrier is manufactured from 8620 steel, while our shot-peened bolt is made from either 9310 or carpenter 158. The bolts are batch high pressure tested and individually magnetic particle inspected after heat-treat to ensure no microcracks.

Charging Handle

The ambidextrous design of the Stryker charging handle allows for multiple ways of use, no matter your shooting side or position.


Features
  • Reinforced in critical areas
  • Monolithic-like appearance between upper and handguard
  • Alignment pins between upper and handguard
Specifications
Material:
Aerospace Grade Aluminum
Finish:
Black Anodized, Space Grey Cerakote, FDE Cerakote, Burnt Bronze Cerakote, Primordial Green Cerakote, Clear Anodized
Compatibility:
Compatible with MILSPEC lower receivers. As of March 8, 2023 they are also compatible with SilencerCo and Radian lower receivers.