Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Questions & Answers
Is this compatible to aero m5 lower? Expert Answer

The Jacob Grey Firearms .308 Winchester Complete Upper Assembly is a DPMS pattern upper and should be compatible with an Aero M5 lower. However, because AR10/LR308 rifles are not standardized like the AR15, I would recommend contacting Jacob Grey and Aero Precision for further clarification.

by Ethan, Gear Expert, July 11, 2024
Is this compatible with the Saint Victor AR10 lower? Expert Answer

Yes, the Jacob Grey Firearms .308 Winchester Complete Upper Assembly is a DPMS pattern upper receiver and will be compatible with your Saint Victor .308 lower receiver.

by Ethan, Gear Expert, February 28, 2023
Customer Reviews
Helpful Positive Review
This beast is awesome by Keithy baby, Verified Owner, January 7, 2023
Bought the 12.5" .308 upper receiver & paired it w / the Aero M5 lower & it's fantastic. Brought it to the range today for the 1st time & I was kinda shocked about how little thump & recoil it administered to my shoulder. It shot incredibly smooth an...
Read More...
9/9 found this helpful
Helpful Positive Review
Beast is still awesome by Keithy baby, Verified Owner, March 23, 2023
So the last round bolt hold open has been fixed. Just had to give it more gas from adjustable block. This product keeps getting better & growing on me every time I take it to the range. The Aero lower is still pretty tight at the pivot pin but there'...
Read More...
5/5 found this helpful
Read All 2 Reviews

Product Discontinued by Manufacturer

Jacob Grey Firearms .308 Winchester Complete Upper Assembly has been discontinued by Jacob Grey Firearms and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

Product Info for Jacob Grey Firearms .308 Winchester Complete Upper Assembly

The Jacob Grey Firearms Low Profile DPMS style AR-10 Warthog Fully Assembled Upper receiver is a perfect match for the Jacob Grey Warthog Billet lower receiver. Not only have we designed an upper receiver that is aggressive in styling, but also weighs less than standard AR-10 Upper Receivers. Excess material was removed from every spot possible without sacrificing the structural integrity of the receiver. Whats left is one of the most stylish, well balanced upper receivers on the market today. The matching machined billet aluminum dust cover is a precise fit to the upper receiver. The low profile .750 adjustable gas block allows the 'Warthog' Upper Receiver to perform flawlessly and accurately each time. With the assembled upper receiver weighing in at just 5lbs complete (bcg, ambi-charging handle and billet dust cover included), with the addition of a 12.5 1/10 twist .308 CMV Barrel, Jacob Grey Firearms has finally done what has been asked for years from AR-10 manufacturers. A pistol length .308 caliber AR-10 upper receiver with the agility and weight reduction to add to your AR-10 lower receiver without compromising any of the features and performance expected from your firearm.image

All NFA/ATF Rules Apply

You may use this assembled upper receiver with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this upper receiver along with a non-NFA lower receiver is prohibited, except when installed on a Pistol configuration firearm.

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

COMPATIBILITY: JG10 LOWER RECEIVER ONLY

Package Contents:

  • Jacob Grey Firearms .308 Winchester Complete Upper Assembly

Gun Triggers

1–15 / 15
Previous
Next

Magazine and Accessories

1–28 / 28
Previous
Next

Firearm Case

1–15 / 15
Previous
Next

Gun Parts and Accessories

1–30 / 30
Previous
Next

Gun Stocks

1–19 / 19
Previous
Next

Gun Barrels

1–14 / 14
Previous
Next

Mounts, Rings and Accessories

1–16 / 16
Previous
Next

Gun Sights

1–15 / 15
Previous
Next

Related Products to Jacob Grey Firearms .308 Winchester Complete Upper Assembly

Jacob Grey Firearms .308 Winchester Complete Upper Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • Jacob Grey Firearms Complete Upper Assembly, AR-10, .308 Winchester, 12.5in, 1-10 Twist, 5/8x24 Thread, Black, 308CUA125 , MPN: 308CUA125 , UPC: 850040696325 , Code: 4M6-URC-308WIG-308CUA125
  • Jacob Grey Firearms Complete Upper Assembly, AR-10, .308 Winchester, 16in, 1-10 Twist, 5/8x24 Thread, Black, 308CUA16 , MPN: 308CUA16 , UPC: 850040696332 , Code: 4M6-URC-308WIG-308CUA16
  • Jacob Grey Firearms Complete Upper Assembly, AR-10, .308 Winchester, 12.5in, 1-10 Twist, 5/8x24 Thread, Carbon Fiber, Black, 308CUA125CF , MPN: 308CUA125CF , UPC: 850040696929 , Code: 4M6-URC-308WIG-308CUA125CF
  • Jacob Grey Firearms Complete Upper Assembly, AR-10, .308 Winchester, 20in, 1-10 Twist, 5/8x24 Thread, Black, 308CUA20 , MPN: 308CUA20 , UPC: 850040696349 , Code: 4M6-URC-308WIG-308CUA20
Compare (0)