Bootleg Partial Upper .300 BLK


Bootleg Inc. Partial Upper .300 BLK (12.5”) starts with a forged M4 upper receiver complete with forward assist and a flat top Picatinny rail.

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Introducing the Bootleg Inc. Partial Upper (12.5″), a game-changer for your AR-15 platform.


Designed for optimal performance and customization, this partial upper takes your shooting experience to new heights.

Starting with a forged M4 upper receiver, complete with a forward assist and flat top Picatinny rail, this upper guarantees durability and compatibility with various accessories. Attach your preferred optics, sights, and other accessories effortlessly.

Attached to the receiver is a high-quality 12.5″ barrel chambered in the versatile .300 BLK. Also, with a 1:8 twist rate, this barrel ensures exceptional accuracy and reliability. The .300 BLK chamber offers versatility in ammunition choices, providing the ability to shoot both supersonic and subsonic rounds with precision and power.


Our proprietary CamLok system is a standout feature of this partial upper. This innovative system securely locks the 11.2” extruded 6061 handguard in place, ensuring stability and minimizing unwanted movement during intense shooting sessions. Take advantage of the M-Lok attachment slots along the 3, 6, and 9 o’clock faces to personalize your firearm with a wide range of accessories, including grips, lights, lasers, and more. Additionally, a full-length Picatinny rail along the top offers even more options for accessory mounting.


For reliable gas operation, the partial upper features a carbine-length gas system connected by our low-profile gas block. This combination optimizes gas flow and cycling, resulting in consistent and smooth performance. Finally, the upper is completed with an A2 muzzle device. This setup effectively reduces recoil and muzzle rise for improved control and follow-up shots.

Upgrade your AR-15 with the Bootleg Inc. 12.5″ Partial Upper and unlock its true potential. Benefit from the rock-solid stability of the CamLok system, personalize your firearm with the versatile M-Lok attachment slots, and enjoy the reliability of a carbine-length gas system. Elevate your shooting experience with a partial upper that delivers exceptional performance, accuracy, and customization options.
Bootleg Partial Upper .300 BLK
Weight5 lbs
Dimensions28 × 8 × 5 in

8.25", 12.5", 16.1"


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