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.50 Beowulf Complete Upper Receivers

AR15Parts.com builds .50 Beowulf complete upper receivers to order for shooters who want the heaviest-hitting caliber available on the AR-15 platform. Every upper is assembled, headspaced, and function-checked in our shop. The .50 Beowulf (12.7x42mm) fires .50-caliber projectiles weighing 300 to 400+ grains, delivering devastating energy at close range. Originally designed by Alexander Arms, it uses a standard AR-15 lower receiver and standard AR-15 magazines at reduced capacity — making it one of the simplest big-bore AR conversions available. Configure your .50 Beowulf upper with your choice of barrel length, handguard, muzzle device, and optional BCG and charging handle.

Why Shooters Choose AR15Parts.com for .50 Beowulf Uppers

Every .50 Beowulf upper is assembled in-house, headspaced, and inspected before shipping. Built to handle the cartridge's substantial operating pressures with quality components. No FFL required.

How to Choose the Right .50 Beowulf Upper

Barrel Length & Gas System

.50 Beowulf uppers are available in 12.7" and 16" barrel lengths with a carbine-length gas system. A 16" barrel maximizes velocity and is the most popular choice. The 1:20 twist rate is standard for the cartridge's heavy, large-diameter projectiles.

Complete Upper vs. Barreled Upper

Complete uppers include the dedicated .50 Beowulf BCG and charging handle. A dedicated bolt is required, so a complete upper is recommended.

Key Specifications

Muzzle Velocity: \~1,800 fps with 350gr Effective Range: 200 yards Barrel Twist: 1:20 Recoil: Heavy but manageable with proper setup Platform: Standard AR-15 lower receiver Projectile Diameter: .50 caliber (12.7mm)

.50 Beowulf Upper Compatibility

The .50 Beowulf uses a dedicated bolt in a standard AR-15 carrier. Standard AR-15 magazines work at reduced capacity — a 30-round magazine body holds approximately 10 rounds of .50 Beowulf. The upper fits any mil-spec AR-15 lower with no modification. Subsonic .50 Beowulf loads can be suppressed with large-bore suppressors for surprisingly quiet operation.

Best Uses for .50 Beowulf Uppers

The .50 Beowulf is built for maximum close-range power. It is effective on the largest North American game including bear, elk, and hog. The cartridge's massive frontal diameter creates devastating wound channels that exceed what any smaller-caliber AR-15 cartridge can deliver. For shooters who want the biggest, most powerful cartridge they can run on a standard AR-15 lower, the .50 Beowulf delivers an experience unlike any other AR caliber.

Frequently Asked Questions

What is included in a complete .50 Beowulf upper?

Complete uppers include the upper receiver, barrel, gas system, handguard, muzzle device, dedicated BCG, and charging handle — assembled and headspaced.

Will a .50 Beowulf upper fit my AR-15 lower?

Yes. The .50 Beowulf uses a standard AR-15 lower receiver with no modification required.

What magazines does .50 Beowulf use?

Standard AR-15 magazines work at reduced capacity. A 30-round magazine body holds approximately 10 rounds.

Can I use my 5.56 BCG?

No. The .50 Beowulf requires a dedicated bolt. A complete upper ensures you have the correct BCG.

What is the effective range?

The .50 Beowulf is effective to approximately 200 yards. It is a close-range power cartridge.

Can I suppress a .50 Beowulf?

Yes. With subsonic loads and a large-bore suppressor, the .50 Beowulf can be suppressed effectively.

How long does shipping take?

Most in-stock configurations ship within 3-5 business days. Custom builds may take 2-3 weeks. Orders over $99 ship free.

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