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Q&A for Jacob Grey Firearms Ultralight 7.62x39mm Complete Upper Assembly — 9 Questions & 7 Answers

Name Jacob Grey Firearms Ultralight 7.62x39mm Complete Upper Assembly (5)
$857.00 $719.49 Save 16%
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Q
Ms SBR, member, from PA, United States, asked on June 21, 2024

So does this fit AR10 lowers or AR15 lowers ?

A
Answered by Kos, guest, from CT, United States, on February 16, 2025

Ar15 lowers only

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Q
Johnny Hua, member, from PA, United States, asked on February 05, 2023

What mag will fit with this upper?

Manufacturer Answer
A
Answered by Jacob Grey, Manufacturer from SC, United States, on October 24, 2023

We recommend using Duramag SS

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Q
Johnny Hua, member, from PA, United States, asked on January 30, 2023

any particular trigger would work with this upper? I know it’s 7.62 and it tends to get a stronger hammer any recommendations?

Manufacturer Answer
A
Answered by Jacob Grey, Manufacturer from SC, United States, on October 24, 2023

Most drop in triggers have a heavier hammer spring, if not you can replace the spring for a heavier one. We offer our JG signature 3.5lb drop in trigger that works great with our 7.62x39. Check it out on our website.

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Q
James, member, from TX, United States, asked on November 08, 2022

Will this be able to be used with a psa ks47 lower? Takes ak47 magazines?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on November 11, 2022

The Jacob Grey Firearms Ultralight 7.62x39mm Complete Upper Assembly is not compatible with the PSA KS47 lower. That lower is only compatible with the PSA KS47 upper.

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Q
Mike, guest, from WA, United States, asked on September 29, 2022

will this fit on a AR lower?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on October 05, 2022

The Jacob Grey Firearms Ultralight 7.62x39mm Complete Upper Assembly is designed to be used with 7.62x39 AR15 lower receivers as you will need 7.62x39 specific magazines for this upper.

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Q
G Mo, member, from NV, United States, asked on September 14, 2022

What is the weight difference between this ultralight 10.5" barrel vs the Jacob Grey Custom 7.62x39 Cal Complete Upper Assembly 10.5" barrel?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on September 14, 2022

Jacob Grey Custom does not provide the overall weight of their 7.62x39 upper receivers. I would recommend reaching out to them directly for more information.

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Q
Steven, guest, from TX, United States, asked on June 11, 2022

Was this included charging handle and BCG?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on July 26, 2022

Yes. The Jacob Grey Custom Ultralight 7.62x39mm Complete Upper Assembly includes a BCG with a reinforced extractor and enhanced firing pin, as well as a JG Ambidextrous Charging Handle.

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Q
Mr Chino, member, from AK, United States, asked on June 16, 2025

Is the profile of the BCG full auto?

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Q
Kenny, member, from GA, United States, asked on April 21, 2025

Is this upper compatible with wolfpack armory WP47 lower receiver? It takes akm magazines.

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