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What are the 2 tabs at the back of the rail supposed to do? There is a gap between my upper receiver and the handguard because of these — 1 Answer

by Hunter2017, from MI, United States Asked on January 10, 2022

Name TRYBE Defense AR-15 Magnesium Alloy Go Fast Ultra Lightweight M-LOK Handguard w/ Cut Top Rail (4.1)
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Answered by Scott, member, from NE, United States, on March 21, 2022

Their purpose is to index the handguard to the upper receiver, to prevent the handguard from being able to rotate.

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Last updated 2025-11-12 UTC.