Tacfire .300 Blackout 5\" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard - BU-300-5
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TacFire
Overview
The Tacfire .300 Blackout 5" AR-15 Complete Upper Receiver is a ready-to-install assembly that includes a bolt carrier group and charging handle, making it an ideal choice for builders looking for convenience and compatibility with the AR-15 platform. Featuring a compact 5-inch barrel length, this upper is designed to optimize performance for the .300 Blackout caliber, allowing for efficient suppression and excellent maneuverability in close quarters. Commonly seen in lightweight and tactical builds, this upper receiver is a solid option for those aiming for a compact firearm setup.
Specifications
Tacfire .300 Blackout 5\" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard - BU-300-5
Available Merchants(4)
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Build history on GunPartPicker
Builders have been adding the Tacfire .300 Blackout 5\" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard - BU-300-5 to their builds on GunPartPicker since February 2026. All time, it ranks #609 of the 1,642 upper receivers builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 3 of the 4 retailers we track have it in stock. The best price drifted down from $349.99 to $314.78 over August 2026 without a real sale. Buying today, the lowest price is $314.78 at KY Gun Company, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 4 builds that include this one
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FAXON Firearms 5.56 M16 Bolt Carrier Group Nitride Chameleon PVD
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Viridian X5L Gen 3 Green Laser and Tactical Light - Black
Lead Star Arms Ravage AR 15 Rifle Buttstock, Red
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