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Hi Ronald and welcome. These should fit (TRUGLO TG231N1) with very minor file fitting as the Sights are the same for the Duty Model : https://www.ebay.com/p/2255432183 ---------------------- Details here : https://www.1911forum.com/threads/tisas-night-sight-update.1036646/

Ronald, pretty sure this uses Novak style sights wich has plenty of aftermarket options. I'd recommend contacting the manufacturer at (865) 604-6894 or you can email them at (orders@sdsimports.com) for a definite answer. Sorry can't give a definite answer but hope this helps some.