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Sigs M400 branded iron sights here https://www.midwestgunworks.com/page/mgwi/prod/kit-trd-sights --------------- Though any aftermarket irons that mount to a lic rail will work.
Marc, have the sights I have searched say yes, others no mention Sir. I would contact Sig Customer Service with the UPC code to verify directly at 603-610-3000 and then press 1, Monday-Friday: 8:30am – 5pm EST - Cheers and stay safe!
Marc, the Sig Tread does not come with flip up sights.
"One thing the TREAD doesn't come from the factory with is iron sights. The TREAD is, as SIG says, optics ready. Translation: there's plenty of Picatinny rail space on top for a red dot, holographic sight or magnified optic." Full write up and review here https://www.thetruthaboutguns.com/gun-review-sigm400-tread-ar-rifle-from-sig-sauer/
