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Questions & Answers
Will this fit onto an Anderson arms mil spec lower? Expert Answer

Yes it should be compatible.

by Ryan Tarczynski, Gear Expert, July 30, 2021
Does this have a rotating m16 bolt notch cut on the inside for a radial delayed cmmg bolt? Expert Answer

Unfortunately the manufacturer has not provided that information, even on their own site. We recommend contacting them directly, they should be able to provide you with that information. You can reach them here: https://guntecusa.com/contact/

by Ethan C., Gear Expert, November 22, 2019
Customer Reviews
Helpful Positive Review
Guntec 9mm AR15 upper is outstanding by MrSpiceman, Verified Owner, January 1, 2019
Didn’t really know what to expect when I ordered this upper. The price seemed a little too low to be much. I was very pleasantly surprised when I received the order. This upper is exceptionally well made. Rock solid billet aluminum. The milling is f...
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3/3 found this helpful
Helpful Positive Review
Gunter ar9 upper receiver by Scott713, Verified Owner, July 3, 2018
Very nice piece, heavy duty as well, Gunter USA is an underrated company, all the receivers Ivw got by them fit tight with 80%lowers,, no fitment issues, just as good of quality as many 2-3x like expensive brands parts, and I have a decent collect...
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1/1 found this helpful
Helpful Negative Review
Very Disappointed by Brian, Verified Owner, October 20, 2018
In general, it is a nice upper, except for one major flaw. The spacing on the rail is non standard so any red dot or scope mount with two or more cross bolts will not fit. Severely limits what you can mount to this upper.
4/4 found this helpful
Most Recent Reviews
Well made despite poor description by Justin, Verified Owner, March 17, 2026
I received this bare upper yesterday and pulled my 8" 9mm barrel off of a multi cal upper and installed it to this one. Threads were nice and all edges are smooth. I use midwest industries handguards and the anti rotation wings that extend onto the s...
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Most Recent Reviews
Very beefy upper. It is so beefy that it is larger than the mil-spec buffer tube mount. Unfortunately, it is not milled to accept handguards that overlap the sides of the upper. The outside of the handguard I tried to install, was flush with the uppe...
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Most Recent Reviews
Great Addition by Fried Jabberwock, Verified Owner, September 20, 2018
I was a little skeptical at first but this thing fits great. Hardly any gap in the lower and upper. Everything went together very easy. I recommended to a friend and he is in the process of building his.
Read All 6 Reviews
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Product Info for Guntec USA AR-15 9mm Dedicated Billet Upper Receiver

The GUNTEC USA AR-15 9mm Dedicated Billet Upper Receiver is a unique addition to the AR-15 family of products. This precision-machined upper is designed as a bolt-action rifle with a 9mm chamber. The dedicated AR-15 9mm upper addresses all of the needs of a 9mm shooter. Turn your AR into a 9mm dedicated upper with the GUNTEC 9mm upper receiver. We pride ourselves in our ability to provide high-quality, precision-machined upper receivers that feature the same attention to detail that our standard AR-15 uppers are renowned for. The accuracy, strength, and reliability of our 9mm uppers make this a special upper. This upper also features an adjustable gas block, making head spacers, forward grips, and the required 9mm mock sight window that is found on most 9mm dedicated upper receivers. The use of standard AR-15 components give you the flexibility to customize your build and still maintain control of your shooting experience. Add a GUNTEC 9mm dedicated billet upper receiver to your build and start shooting with the best in the business.image

Specifications for Guntec USA AR-15 9mm Dedicated Billet Upper Receiver:

Manufacturer: Guntec USA
Caliber: 9mm Luger
Gun Model: AR-15

Package Contents:

  • Guntec USA AR-15 9mm Dedicated Billet Upper Receiver

Guntec USA AR-15 9mm Dedicated Billet Upper Receiver Orderable Models

List of Orderable Models

  • Guntec USA AR-15 9mm Dedicated Stripped Billet Upper Receiver, Black, GT-UPPER-9 , MPN: GT-UPPER-9 , UPC: 714569646493 , Code: 2AH-UPR-GAR9MMSBP-GT-UPPER-9
  • Guntec USA AR-15 9mm Dedicated Stripped Billet Upper Receiver, Raw, GT-UPPER-9-R , MPN: GT-UPPER-9-R , Code: 2AH-UPR-GAR9MMSBP-GT-UPPER-9-R
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