Q&A for Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver w/15 inch MLOK Rail

Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver w/15 inch MLOK Rail

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James Chen, member, from CA, United States, asked on March 08, 2025

will this upper be compatible with other brands glock 9mm magazine adapters?

Manufacturer Answer

Answered by STERN DEFENSE, Manufacturer from MO, United States, on March 26, 2025

Yes, however if you are using our MAG-AD with this upper we recommend factory magazines.

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rose, guest, from GA, United States, asked on December 30, 2024

is the gas block pinned

Manufacturer Answer

Answered by STERN DEFENSE, Manufacturer from MO, United States, on March 26, 2025

This is a direct blowback system. No gas block.

0 of 1 found the following answer helpful.

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Pewpew72, member, from UT, United States, asked on December 28, 2024

Is this a pistol length gas tube?

Manufacturer Answer

Answered by STERN DEFENSE, Manufacturer from MO, United States, on March 26, 2025

This is a direct blow back system no gas tube.

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Flint, member, from CA, United States, asked on November 07, 2024

Will this upper work with a standard AR-15 lower because I want to use an MEAN endomag 9mm conversion kit. Thanks.

Manufacturer Answer

Answered by STERN DEFENSE, Manufacturer from MO, United States, on November 27, 2024

Yes, it will.

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Jd, guest, from AL, United States, asked on October 05, 2024

I have a black rain ar15.I’m wanting to convert it into a 9mm.Is this upper compatible with the lower ,besides mag adapter what else is needed. Thanks

Manufacturer Answer

Answered by STERN DEFENSE, Manufacturer from MO, United States, on November 27, 2024

Yes, we have several of their lowers we test with.

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Jeff Newberg, member, from IL, United States, asked on February 08, 2023

Will this upper be compatible with Glock magazines?

Expert Answer

Answered by Ethan, Gear Expert, from IL, United States, on November 15, 2023

Yes, the Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver is intended to be paired with Glock pattern 9mm magazines.

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Korosario, member, from GU, United States, asked on July 03, 2022

Does this upper work well with the fox trot mike lower chambered in 9MM ?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on July 19, 2022

The Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver should work fine with the FM 9 lower receiver.

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frank, member, from CA, United States, asked on January 17, 2022

This 9mm upper is Include Magazine Conversion or magewell ? Or do I need to buy it separately?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on January 25, 2022

This Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver does not include a magazine conversion, so you would need to get that separately.

2 of 2 found the following answer helpful.

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freeinMA, member, from MA, United States, asked on December 29, 2021

Does this work with a Colt lower? The Colt lowers have a slightly larger front pin/screw.

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on January 25, 2022

The Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver may be compatible, I would email us at techsales@opticsplanet.com or contact the manufacturer for confirmation on compatibility.

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Scottie, member, from FL, United States, asked on October 12, 2021

Is there a Left Hand option?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on January 25, 2022

There is currently not a left handed Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver.

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Q&A for Stern Defense AR-15 16.1 inch Assembled 9mm Upper Receiver w/15 inch MLOK Rail — 24 Questions & 21 Answers