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What size wrench does the barrel nut use — 3 Answers

by Stephen Skiver, from MI, United States Asked on April 9, 2022

Name Presma AR-15 Super Light Slim Free Float M-LOK Handguards w/ Partial Top Rail (4)
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Answered by Ethan, Gear Expert, from IL, United States, on May 11, 2022

Presma does not specify the size wrench needed for the AR-15 Super Light Slim Free Float M-LOK Handguards barrel nut. The barrel nut itself does not require any timing. This Handguard will include the screws and a hex wrench as well. I would recommend reaching out to Presma directly for more information.

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Answered by Bump, member, from SC, United States, on July 29, 2025

I just received mine. I measured the barrel nut. It will take a 30mm crowfoot nut wrench. Easily available on Amazon. Make sure to get the thin one.

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Answered by Doc, member, from CA, United States, on February 02, 2025

1 3/16”…..

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