Thread: Installing quad rail on M&P 15/15A
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Old 08-14-2009, 10:58 AM
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S-W4EVER S-W4EVER is offline
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I installed a Troy Industries MRF-DI on my M&P-15A. Troy Industries, Inc. - Drop In BattleRail

It installs just like the regular handguards, although you have a couple of screws to tighten. It does not require the removal of the delta ring.
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