Snapshot 0 Posted March 1, 2007 Report Share Posted March 1, 2007 According to EAA, the front sight thread size on the S-.410 and probably the other shotties(on the gas tube) is 4mm x 7. Quote Link to post Share on other sites
Snapshot 0 Posted March 2, 2007 Author Report Share Posted March 2, 2007 I'm fairly certain its supposed to read: 4mm x .7 Quote Link to post Share on other sites
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