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  1. Non-FFL
    Selling my SIG556 M4 version here. I know it's non-FFL posts, so just providing the link. Here's a pick for reference. Upgraded mil-spec buffer tube, modified magpul grip and trigger guard and US made classic handguards ( came with fishgill handguards). SIG556 M4 Parts Kit $60 Shipped - SOLD...
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