XS Sight Systems 24/7 Big Dot S&W M&P Fixed Sights and Compact

XS SIGHTS EXPRESS HANDGUN SIGHTS - S&W M&P - DXW BIG DOT*a Standard (Std.) DotA(R) & Big DotA(R) sights have TrijiconA(R) Tritium dots within standard or big white dots a Precision-machined low-profile & snag-free a Enhances sight acquisition in all light conditions a Provides ultimate "Flash Sight" picture a Excels in high stress defensive situations a Improves low-light accuracy a NOTE: DXW* denotes a tritium front & white stripe (non-tritium) rear; DXT** denotes a tritium front & a tritium rear; S&W J-Frame*** & Ruger SP101*** models must have drilled pin hole to install sight - Do NOT use pusher installation kit included; WALTHER PPS/PPS M2/CCP**** - CCP installation will destroy bottom of t-slot cannot go back to factory sights