Tacfire 5" Complete Upper Assembly 5.56x45mm 1:5, Black - BU-556-5
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TacFire
Overview
The Tacfire 5" Complete Upper Assembly is designed for the AR-15 platform and chambered in 5.56 NATO, making it a solid choice for builders looking to create a compact, high-velocity firearm. The 1:5 twist rate is optimized for stabilizing heavier projectiles, allowing for enhanced accuracy and performance with a range of ammunition types. This upper assembly is commonly used in builds focused on tactical applications and short-barreled rifles.
Specifications
Tacfire 5" Complete Upper Assembly 5.56x45mm 1:5, Black - BU-556-5
Build history on GunPartPicker
Builders have been adding the Tacfire 5" Complete Upper Assembly 5.56x45mm 1:5, Black - BU-556-5 to their builds on GunPartPicker since February 2026. All time, it ranks #214 of the 1,654 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO and nearly all AR-15.
It was in stock most days in September 2026, and today 5 of the 6 retailers we track have it in stock. It dipped to $289.99 at Optics Planet for a stretch in September 2026, under its usual $322.02, so sales do come around. Buying today, the lowest price is $275.97 at BattleHawk Armory, which matches the best price we saw in September.
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 builds that include this one
Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002
Strike Industries Latchless Charging Handle - Red
CMMG AR-15 Mil-Spec Trigger KIT
PSA AR-15 Bolt Carrier Group 5.56 Full-Auto Nitride MPI - 516446953
Bravo Company Manufacturing BCMGUNFIGHTER Vertical Grip - Mod 3 - KeyMod - Black
CMMG AR-15 Magazine Catch Ambidextrous
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