Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7
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TacFire
Overview
The Tacfire 7" Complete Upper Assembly is designed for AR-15 platforms and features a 7-inch barrel chambered in 5.56 NATO with a 1:8 twist rate, which provides excellent stability for a range of bullet weights. This complete upper is ready to install, making it a convenient choice for builders looking to create a compact and agile firearm. Commonly found in builds with a carbine gas system, this assembly is ideal for those seeking a lightweight and maneuverable option for tactical or close-quarters applications.
Specifications
Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7
Available Merchants(6)
Prices checked
Price Alert
October 2026 so far on GunPartPicker
Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7 is the fourth most added upper receiver on GunPartPicker so far in October 2026, behind the PSA AR-15 Upper 5.56 16" Mid-Length Nitride 13.5" M-LOK - 5165448513, with about 3% of all upper receivers added to builds. Up from #6 in September. Builds with this upper receiver are nearly all chambered in 5.56 NATO, split between carbine-length (40%) and rifle-length (40%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today all 6 retailers we track have it in stock. It dipped to $258.99 at Ammunition Depot for a stretch in September 2026, well under its usual $289.99, so sales do come around. Buying today, the lowest price is $241.33 at BattleHawk Armory, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by hundreds of builds that include this one
Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002
Breek Arms AR-15 Warhammer MOD2 Ambidextrous Charging Handle Black
Rise Armament Advanced Performance Trigger, Red - RA-535-RED-ARP
Cryptic Coatings 5.56 NATO AR-15 Bolt Carrier Group - Mystic Bronze
Magpul AFG-2 Angled Fore Grip - Black
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 1 →Builds in the community that include the Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7
| Build | Parts | Total |
|---|---|---|
 | 17 | $1714.43 |
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