Every 300 BLK upper we sell can be configured to your specifications. Customize your 300 Blackout Complete Upper with an optic, muzzle device, rail, bolt carrier group, magazine, or charging handle from our matched selection. Your 300 Blackout AR 15 upper receiver will arrive turn-key and ready to shoot out of the box.

--- readmore ---

.300 AAC Blackout (7.62x35mm) was developed as an upgrade to the 5.56 NATO, using fast burning powder to eliminate powder flash. 300 Blackout will operate either supersonic for long range application, or subsonic and suppressed for close quarters engagements.

You May Also Like:

556 NATO | 223 WYLDE | 7.62X39

.300 BLACKOUT Uppers For Sale

What is a 300 Blackout Upper Receiver?

Designed for use by the military, but now on the civilian market, the 300 Blackout upper receiver is a multi-functional and diverse upper receiver designed to mimic the kinetics of a Soviet 7.62x39 round, using an AR-15 platform, including standard AR-15 magazines.What are some of the main advantages of a 300 Blackout Upper Receiver on an AR-15 platform?

One of the main advantages of using a 300 Blackout upper receiver on an AR-15 platform is that the receiver can accommodate larger and heavier projectiles, making it a versatile upper receiver that can be run super sonic, or subsonic and suppressed.

Can the 300 Blackout Upper Receiver Fire Whilst Suppressed?

Yes! One of the benefits of 300 Blackout Upper Receivers is that they allow you to fire through a suppressor, using both subsonic and supersonic ammunition seamlessly, without needing to make an additional modification. However, if you’re planning on firing using a suppressor, it may be a good idea to shorten your barrel length to between 8 and 10 inches.

What is the Effective Range of a 300 Blackout Upper Receiver?

The effective range of a 300 Blackout Upper Receiver is around 500 yards when fired from a 16-inch barrel, however, is highly variable depending on ammunition type and exact barrel length used.

What BCG do I use with a 300 Blackout Upper?

300 Blackout Uppers use the standard 223/556 Bolt Carrier Group (BCG).

What Magazine do I use with a 300 Blackout Upper?

300 Blackout Uppers can use the standard 223/556 Magazine. There are 300 Blackout specific magazines that are recommended for optimal performance.

26 Products

Sort by: