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Tacfire .300 Blackout 5" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard - BU-300-5

Tacfire .300 Blackout 5" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard - BU-300-5 - Upper Receiver for AR-15 - view 1

TacFire

Overview

The Tacfire .300 Blackout 5" AR-15 Complete Upper Receiver is designed for those looking to build a compact and versatile firearm. This complete assembly features a 5-inch barrel specifically chambered for .300 Blackout, allowing for efficient performance in both subsonic and supersonic loads. With its M-LOK handguard and included bolt carrier group and charging handle, this upper receiver is perfect for a range of applications, particularly in builds focused on the .300 Blackout caliber.

Specifications

MPNACC-TACF-BU3005
AssemblyComplete
PlatformAR-15
Caliber300 Blackout
ColorBlack
Barrel Length5

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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 #917 of the 1,653 upper receivers builders have added.

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Frequently Built With

The part most often added in each category by the builds that include this one

PSA JAKL 300 Blackout Complete Lower Classic EPT w/o Brace, Black

PSA JAKL 300 Blackout Complete Lower Classic EPT w/o Brace, Black

Lower Receiver$250in 67% of them
FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR

FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR

Bolt Carrier Groupin 67% of them
Breek Arms Sledgehammer AR-10 Ambidextrous Charging Handle Gray

Breek Arms Sledgehammer AR-10 Ambidextrous Charging Handle Gray

Charging Handle$100in 33% of them
Magpul AFG-2 Angled Fore Grip - Flat Dark Earth

Magpul AFG-2 Angled Fore Grip - Flat Dark Earth

Foregrip$24in 33% of them
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger

Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger

Trigger$335in 33% of them
Aimpoint Micro T-2 Red Dot Sight with 2 MOA Dot Picatinny Mount Matte Black

Aimpoint Micro T-2 Red Dot Sight with 2 MOA Dot Picatinny Mount Matte Black

Optic$902 · out of stockin 33% of them

Builds Featuring This Part

See all 1 →

Builds in the community that include the Tacfire .300 Blackout 5" AR-15 Complete Upper Receiver with Bolt Carrier Group, Charging Handle, M-LOK Handguard - BU-300-5

BuildPartsTotal
recce 6" 300 blackout build
recce 6" 300 blackout		6$440.52

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