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Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly Up to 57% Off, Blazin' Deal w/ Free S&H — 4 models

Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 7.5in, Black, 556N75ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 10.5in, Black, 556N105ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 16in, Black, 556N16ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
1 of 10 images
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 7.5in, Black, 556N75ULCUA
2 of 10 images
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 7.5in, Black, 556N75ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 10.5in, Black, 556N105ULCUA
3 of 10 images
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 10.5in, Black, 556N105ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 16in, Black, 556N16ULCUA
4 of 10 images
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 16in, Black, 556N16ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
5 of 10 images
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
6 of 10 images
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
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Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
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Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
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Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA
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Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA

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Questions & Answers
Customer Reviews
Helpful Positive Review Impressive by The Beard, November 11, 2022
I don’t normally take the time to do a review but I felt compelled. I purchased the 16” when it was on sale. This is Tier 1 quality @ a great price point. We we’re getting great groups out of the box. I only have about one hundred rounds through it. ...
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3/3 found this helpful
Helpful Positive Review light upper but solid upper receiver. by Send, Verified Owner, October 20, 2022
I love this complete upper receiver. you guys are seriously missing out. comes with bcg and charging handle I’m so happy with this birthday gift of mine for myself. it doesn’t come with a forward assist which i don’t mind. i got the 16” 5.56 model. d...
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1/1 found this helpful
Helpful Negative Review Not impressed by Huey, Verified Owner, February 17, 2025
This URG has given more problems and joy. Failure to feed issues from day one. RMA'ed but still having issues. The same lower receiver/mags/ammo has had zero issues on a different upper. I would love to give this company the benefit of the doubt, bu...
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1/1 found this helpful
Most Recent Reviews Jacob Grey upper receiver by BusaGroot0311, July 31, 2025
Love the upper receiver, I wish the upper portion was wide enough for MLOK inserts. Which there are ways around that by purchasing Kinetic Development Group picatiny rail mounts. Very good quality overall, nothing bad to say.
Read All 4 Reviews

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Product Info for Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly

The Jacob Grey Ultralight Complete Upper Assembly was designed with the next generation AR-15 in mind. This AR-15 complete upper assembly is built around the 7075-T6 billet upper receiver specifically machined and cut in areas where excess material was unnecessary and areas that see excess use and wear, reinforced and strengthened to give a sleek, refined look, without losing the classic lines of the AR-15 platform. It comes standard with the JG designed free float 7-sided M-LOK hand-guard that is also lightweight and leaves plenty of room for customization or the addition of numerous accessories available for the AR-15 platform. The barrel is chambered in 5.56 NATO with a 1:7 twist rate. The barrel is machined from 4150 chrome moly steel and black Nitride finished for corrosion resistance and accuracy. Each barrel is individually head-spaced to the Carpenter 158 bolt. Combined with the 8620 steel carrier and black Nitride finish, this complete upper assembly is extremely reliable and smooth shooting.image

DISCLAIMER: Firearm specifications are subject to change at any time based on availability and supply chain shortage.

Specifications for Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly:

Manufacturer: Jacob Grey Firearms
Caliber: 5.56x45mm NATO
Barrel Profile: Government
Barrel Twist Rate: 1-7
Threads per Inch: 1/2x28
Handguard Type: Free-Float
Muzzle Device: Brake
Finish: Type III Class 2 Hardcoat Anodized
Color: Black
Fabric/Material: Aerospace Aluminum
Gas Block Journal Size-Diameter: .075 in
Handguard Style: Round Rail
Gun Rail: M-LOK
Gun Type: Rifle
Gun Make: AR Platform
Gun Model: AR-15
Weight: 7.7 oz
Condition: New
Barrel Material: Chrome Moly
Gas Block Journal Size-Length: 1.9 in
Bolt Carrier Group Included: MIL-SPEC
Magazine Included: No
Charging Handle Included: MIL-SPEC
Mount Type: M-LOK

Features of Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly

  • Compatible with most aftermarket/OEM handguards featuring indexing tabs
  • Billet 7075-T6 aerospace aluminum
  • Jacob Grey lightweight design
  • M4 feed ramps
  • Machined T-marks
  • Laser engraved logo
  • MIL-A-8625F Type III Class 2 hardcoat anodized flat black finish
  • Compatible with MIL-SPEC AR upper receiver parts
  • JG ULTRALIGHT Handguard

Package Contents:

  • Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly

Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly Orderable Models

List of Orderable Models

Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 7.5in, Black, 556N75ULCUA , MPN: 556N75ULCUA , UPC: 850040696035 , Code: 4M6-URC-GJUN1-556N75ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA , MPN: 556N13ULCUA , UPC: 850040696011 , Code: 4M6-URC-GJUN1-556N13ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 10.5in, Black, 556N105ULCUA , MPN: 556N105ULCUA , UPC: 850040696028 , Code: 4M6-URC-GJUN1-556N105ULCUA
Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 16in, Black, 556N16ULCUA , MPN: 556N16ULCUA , UPC: 850040696004 , Code: 4M6-URC-GJUN1-556N16ULCUA

Jacob Grey Firearms Ultralight 5.56 NATO Complete Upper Assembly Unavailable & Discontinued Models

List of Unorderable Models

USED, Jacob Grey Firearms Ultralight Complete Upper Assembly, 5.56 NATO, 13in, Black, 556N13ULCUA , MPN: 556N13ULCUA-EDEMO , Code: 4M6-URC-GJUN1-556N13ULCUA-EDEMO-RE-B
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