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  1. Uppers, Lowers, Barrels and Parts
    I'm thinking about putting Swiss handguards on my Sig 556 ER Upper (JS023XXX). I currently have the U.S. made Swiss-style handguards, which I like, however they are just a bit wobbly. Do the real Swiss 551 handguards fit better on these models? Do they have to be shimmed?
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