Re: Which EOtech?
I have been running 553's on M-4's, SIG SBR's,and a Noveske10.5" Mk18 for over 5 years with no problems period.Plus all my other lights and battery needs are 123's which makes life alot easier.My oldest 553 has been abused some ,dropped, water logged and been through 3 ,12-16" snow storms, no problems. Excellent kit!