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Q&A for FM Products Foxtrot Mike 5.56 Matched Set UltraLight Monolithic Upper — 5 Questions & 5 Answers

Name FM Products Foxtrot Mike 5.56 Matched Set UltraLight Monolithic Upper (4)
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Q
Callsign, member, from OH, United States, asked on February 03, 2020

Will this work for PCC 9mm build?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on March 05, 2020

Yes, it should.

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Q
DANE, guest, from NV, United States, asked on December 14, 2019

Would any of these lengths work with a staked FSB or is a rail mounted site the only option?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on January 15, 2020

They are designed to be used with a low profile gas block.

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Q
P. Sims, member, from AL, United States, asked on October 08, 2019

What’s the weight of the 15” handguard or assembly? What’s the inner diameter of the handguard?

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on October 25, 2019

The 15" handguard weighs 11.6 oz. and the inside diameter is 1.3".

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Q
Thomas, member, from CA, United States, asked on July 03, 2019

Does this work with FM products 9mm lightweight barrel

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A
Answered by Jerbear, member, from PA, United States, on July 07, 2019

Yes. It will work with anything AR15 based. I run a radially delayed blowback bolt & barrel from a CMMG Guard/ Banshee in mine.

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Q
dwight, guest, from OK, United States, asked on January 01, 2019

is it dpms compatible?

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Answered by Jerry, guest, from NC, United States, on March 07, 2019

This is 5.56, not .308 (7.62x51).

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Last updated 2025-11-12 UTC.