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Q&A for Guntec USA AR-15 9mm Dedicated Billet Upper Receiver — 3 Questions & 2 Answers

Name Guntec USA AR-15 9mm Dedicated Billet Upper Receiver (4.2)
As Low As $95.99 Save Up to 24%
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Q
BrickCitizen, guest, from PA, United States, asked on May 13, 2021

Will this fit onto an Anderson arms mil spec lower?

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Answered by Ryan Tarczynski, Gear Expert, from IL, United States, on July 30, 2021

Yes it should be compatible.

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Justme, member, from AL, United States, asked on January 31, 2019

Does this have a rotating m16 bolt notch cut on the inside for a radial delayed cmmg bolt?

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Answered by Ethan C., Gear Expert, from IL, United States, on November 22, 2019

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/

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blacksmith, member, from TX, United States, asked on March 02, 2026

Will this work for a 45acp build?

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