Shorty DOC Complete Upper Receiver MLOK


The Upper receiver from the Shorty DOC. Comes with the MD Enhanced Bolt Carrier Group and Radian Charging handle. Details below.

Categories: , , SKU: V3


Shorty DOC Complete Upper Receiver MLOK Overview

Upper Receiver:

  • Construction: The billeted upper receiver is a masterpiece of precision engineering, crafted to exacting tolerances. It features a flawlessly flat barrel face that ensures perfect alignment with the upper, significantly enhancing accuracy.
  • Coating: The upper receiver is finished with E Series Cerakote atop type 3 anodizing. This dual-layered coating not only provides a sleek appearance but also reduces component wear and protects against corrosion, extending the lifespan of the firearm.


  • Connection: Features a Thermal Fit Barrel-to-Upper connection that creates a rock-solid bond, minimizing wear to the bolt and enhancing the firearm’s stability and accuracy.
  • Material and Finish: The 10.3-inch barrel is made from CrMov steel with a QPQ nitride finish, offering exceptional durability and performance.
  • Twist Rate: The barrel has a 1:7 twist rate, ideal for stabilizing a wide range of bullet weights.
  • Gas System: Equipped with a carbine length gas system for 5.56 NATO and a pistol length system for 300 BLK, optimizing performance and reliability across various shooting conditions.


  • Charging Handle: Includes an MD marked Radian ambi charging handle that enhances the firearm’s operational efficiency.
  • Bolt Carrier Group: The MD Enhanced Bolt Carrier Group is coated in ArmorLube, which significantly reduces friction, enhancing the reliability and efficiency of the firearm.


  • Length and Design: The 9.5-inch handguard is designed with Mlok slots at 3, 6, 9, and 45-degree intervals, providing ample space for mounting accessories.
  • Stability Features: Equipped with anti-rotational tabs and a patented retention system, the handguard remains securely in place even under strenuous use.

Muzzle Device:

  • Type: The upper receiver is finished with an A2 Birdcage muzzle device, contributing to the overall functionality and aesthetic of the firearm.


The Shorty Doc Upper Receiver MLOK is a testament to meticulous craftsmanship, innovative design, and advanced features. This upper receiver sets a new standard for excellence in firearm engineering, offering unparalleled accuracy, performance, and reliability. It is an ideal choice for discerning shooters looking for a top-tier firearm component that delivers consistent performance in various environments and scenarios.

Additional information


E series Cerakote on top of Type 3 Hardcoat Anodized


10.3 CrMov Steel finished in QPQ nitride 1:7 Twist


MD Thermal fit billet upper


9.5 with Mlok at 3,6,9 as well as 45s, anti rotational tabs, Patented retention system.

Charging Handle

MD Marked Radian Raptor Ambi

Gas system

Carbine Length

Gas block

Non Adjustable, Pinned


5.56 Nato, 300 BLK


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