0 FacebookTwitterPinterestWhatsapp Survival Kit Nighthawk IOS System Review: BEST 1911 Optic Cut — Swift | Silent by David Walker January 22, 2026 by David Walker January 22, 2026 0 comments Disadvantage: Non-Standard FP Stop Another very small disadvantage of the IOS system is that the firing pin stop is non-standard. It has to be cut to match the rear of … Read more