The Rankin Industries 7.5 inch 300 Blackout upper is a complete upper receiver assembly chambered in .300 Blackout, built by Western Sport’s gunsmith team for AR-15 pattern rifles. This upper does not include a bolt carrier group or charging handle.
The 7.5 inch barrel length delivers a compact profile well-suited to short-range use and suppressed shooting. It pairs with standard AR-15 lower receivers.
Rankin Industries is Western Sport’s own brand.
Key Facts
Brand: Rankin Industries
Caliber: .300 Blackout
Barrel Length: 7.5 inch
Configuration: Complete upper without BCG or charging handle
Why Choose a 7.5 Inch 300 Blackout Upper
A 7.5 inch barrel in .300 Blackout offers maximum compactness while maintaining reliable performance with both supersonic and subsonic ammunition. The shorter barrel length is particularly effective for home defense and vehicle applications where maneuverability matters.
The .300 Blackout cartridge was designed specifically to perform in shorter barrels. Unlike 5.56 NATO, which loses significant velocity and effectiveness below 10 inches, .300 Blackout maintains consistent terminal performance even at very short barrel lengths. This makes a 7.5 inch configuration viable for practical use.
Subsonic loads run especially well in this platform when paired with a suppressor. The shorter barrel reduces overall system length while still allowing complete powder burn.
What You Need to Complete This Upper
This upper does not include a bolt carrier group or charging handle. You will need to add a .300 Blackout or 5.56 NATO bolt carrier group and a standard AR-15 charging handle before installation.
The upper mounts directly onto any mil-spec AR-15 lower receiver. No additional parts or adapters are required for fitment.
Send us a message to confirm thread pitch, handguard type, and other specifications before ordering if those details matter for your build.
How This Compares to Longer 300 Blackout Uppers
Compared to 10.5 inch or 16 inch 300 Blackout uppers, a 7.5 inch barrel sacrifices some muzzle velocity but gains several inches of overall length reduction. For suppressed use, the difference in velocity between 7.5 and 10.5 inches is minimal with subsonic loads.
Longer barrels deliver higher velocity with supersonic ammunition and may produce slightly less muzzle flash. Shorter barrels excel in confined spaces and vehicle deployment. Your intended use should drive the choice.
Ordering from Western Sport
Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
Q: Does the 7.5 inch 300 Blackout upper come with a bolt carrier group?
A: No, this upper does not include a bolt carrier group or charging handle. You will need to purchase those components separately. Any mil-spec AR-15 bolt carrier group chambered for .300 Blackout or 5.56 NATO will work with this upper.
Q: Will this upper fit my AR-15 lower receiver?
A: Yes, this Rankin Industries upper fits any mil-spec AR-15 lower receiver. The takedown pin spacing and mounting interface are standard AR-15 pattern. It will not fit AR-10 or other large-frame receivers.
Q: How does a 7.5 inch barrel perform compared to a 10.5 inch 300 Blackout upper?
A: A 7.5 inch barrel delivers slightly lower velocity than a 10.5 inch barrel, especially with supersonic loads. The difference is minor with subsonic ammunition. The 7.5 inch configuration offers a more compact overall package, while the 10.5 inch may produce less muzzle flash and slightly higher energy downrange.
Q: Can I use this upper for suppressed shooting?
A: Yes, .300 Blackout is commonly used with suppressors, and the 7.5 inch barrel length works well for that purpose. Send us a message to confirm the barrel thread pitch so you can ensure compatibility with your suppressor mount.
Q: Who builds Rankin Industries uppers?
A: Rankin Industries is Western Sport’s own brand. Owner and lead gunsmith Lance Rankin oversees quality control for all Rankin Industries products.
Q: How do I purchase this upper if I live in Texas?
A: Complete upper receivers do not require an FFL transfer in Texas.
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