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TacFire 5.56 NATO Complete Upper Assembly Up to 12% Off w/ Free S&H — 4 models

Special offer available for this product. Click here to see!
TacFire Complete Upper Assembly, 5.56 NATO, 7in, Type III Hard Anodized, Black, Large, BU-556-7
TacFire Complete Upper Assembly, 5.56 NATO, 5in, Type III Hard Anodized, Black, Large, BU-556-5
TacFire Complete Upper Assembly, 5.56 NATO, 10in, Type III Hard Anodized, Black, Large, BU-556-10
TacFire Complete Upper Assembly, 5.56 NATO, 16in, Type III Hard Anodized, Black, Large, BU-556-16
TacFire Complete Upper Assembly, 5.56 NATO, 7in, Type III Hard Anodized, Black, Large, BU-556-7
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TacFire Complete Upper Assembly, 5.56 NATO, 7in, Type III Hard Anodized, Black, Large, BU-556-7
TacFire Complete Upper Assembly, 5.56 NATO, 5in, Type III Hard Anodized, Black, Large, BU-556-5
2 of 4 images
TacFire Complete Upper Assembly, 5.56 NATO, 5in, Type III Hard Anodized, Black, Large, BU-556-5
TacFire Complete Upper Assembly, 5.56 NATO, 10in, Type III Hard Anodized, Black, Large, BU-556-10
3 of 4 images
TacFire Complete Upper Assembly, 5.56 NATO, 10in, Type III Hard Anodized, Black, Large, BU-556-10
TacFire Complete Upper Assembly, 5.56 NATO, 16in, Type III Hard Anodized, Black, Large, BU-556-16
4 of 4 images
TacFire Complete Upper Assembly, 5.56 NATO, 16in, Type III Hard Anodized, Black, Large, BU-556-16

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Questions & Answers
Is the flash hider pinned or can it unscrew? Manufacturer Answer

We do not pin or weld any of our barrels.

by TACFIRE INC., Manufacturer, December 17, 2025
Is this 1:8 barrel twist ratio or 1:7 because it mentioned two different specifications, in title & details.

the 16 inch variant has 1/8 inscribed on the barrel, although I have not measured the twist rate to confirm.

by Nehemiah Bianchi, Verified Owner, September 26, 2025
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
5.56 upper by Sincere, June 21, 2023
Great product shoots great no issues after 2k rounds. Pretty accurate came fast free shipping .I would recommend this upper to everyone. If you want a affordable upper try this one. I promise you will like it
2/2 found this helpful
Helpful Positive Review
Excellent value by Shaun, Verified Owner, May 29, 2024
Perfect fit for my Rock River lower. Rounds cycled perfect.
2/2 found this helpful
Helpful Positive Review
Very good bargain uppers. by S. Templar, D.D., Verified Owner, January 7, 2025
I own six of these uppers, from 5" to 10.5". The quality is quite good when considering the low prices these sell for. I definitely recommend these uppers to anyone looking to build a budget AR that works grear and shoots straight.
1/1 found this helpful
Helpful Positive Review
tacfire pistol upper by Surge, Verified Owner, October 22, 2023
Great pistol length upper. Lightweight, I got the 10 inch. Paired perfectly with my aero lower. Did have issues cycling another round until I played with different buffer spring weights. This shorter barrel requires the lightest buffer spring you can...
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3/3 found this helpful
Most Recent Reviews
Great upper for the price by James, Verified Owner, May 23, 2025
I’ve only shot it about 500 times but it’s hasn’t given me any issues and it runs like a toy lol.
Read All 5 Reviews
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ATTENTION! We currently do not ship this product to AK, CA, HI, IL, NY, WA, P.O. Boxes, and U.S. Territories. Please see our policies for more information.

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for TacFire 5.56 NATO Complete Upper Assembly

This complete upper receiver features a 1:7 twist 5.56 NATO barrel along with a M-LOK freefloating handguard. Mil-Spec BCG and charging handle are included in this build.image

WARNING: California`s Proposition 65

Specifications for TacFire 5.56 NATO Complete Upper Assembly:

Manufacturer: TacFire
Caliber: 5.56x45mm NATO
Barrel Profile: Government
Barrel Twist Rate: 1-8
Threads per Inch: 1/2x28
Handguard Type: Free-Float
Muzzle Device: A2 Flash Hider
Finish: Type III Hard Anodized
Color: Black
Gun Model: AR-15
Condition: New
Gas Block Journal Size-Diameter: .075 in
Gun Rail: M-LOK
Gun Make: AR Platform
Barrel Material: 4150 Chrome Moly Vanadium
Bolt Carrier Group Included: MIL-SPEC
Charging Handle Included: MIL-SPEC
Magazine Included: No
Mount Type: M-LOK
Country of Origin: USA

Features of TacFire 5.56 NATO Complete Upper Assembly

  • Mil-Spec upper receiver chambered in 5.56 Nato with A2 flash hider

Package Contents:

  • TacFire 5.56 NATO Complete Upper Assembly
  • Bolt Carrier Group / Charging Handle

What firearm models does the manufacturer say TacFire 5.56 NATO Complete Upper Assembly is compatible with?

The manufacturer suggests that TacFire 5.56 NATO Complete Upper Assembly is compatible with AR-15

TacFire 5.56 NATO Complete Upper Assembly Orderable Models

List of Orderable Models

  • TacFire Complete Upper Assembly, 5.56 NATO, 7in, Type III Hard Anodized, Black, Large, BU-556-7 , MPN: BU-556-7 , UPC: 729205500503 , Code: 29U-UFH-BLUR10-BU-556-7
  • TacFire Complete Upper Assembly, 5.56 NATO, 10in, Type III Hard Anodized, Black, Large, BU-556-10 , MPN: BU-556-10 , UPC: 729205518300 , Code: 29U-UFH-BLUR10-BU-556-10
  • TacFire Complete Upper Assembly, 5.56 NATO, 5in, Type III Hard Anodized, Black, Large, BU-556-5 , MPN: BU-556-5 , UPC: 659725496003 , Code: 29U-UFH-BLUR10-BU-556-5
  • TacFire Complete Upper Assembly, 5.56 NATO, 16in, Type III Hard Anodized, Black, Large, BU-556-16 , MPN: BU-556-16 , UPC: 686294505850 , Code: 29U-UFH-BLUR10-BU-556-16

TacFire 5.56 NATO Complete Upper Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • USED, TacFire Complete Upper Assembly, 5.56 NATO, 5in, Type III Hard Anodized, Black, Large, BU-556-5 , MPN: BU-556-5-EDEMO , Code: 29U-UFH-BLUR10-BU-556-5-EDEMO-RE-C
  • DEMO, TacFire Complete Upper Assembly, 5.56 NATO, 7in, Type III Hard Anodized, Black, Large, BU-556-7 , MPN: BU-556-7-DEMO , Code: 29U-UFH-BLUR10-BU-556-7-DEMO
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