C&H Precision BUIS (Back Up Iron Sights) were specifically designed to be used with the OEM Optic Ready Slides and Direct Milled Slides.
LowWitness is defined as a BUIS (Back Up Iron Sights) that sits between .075″ to .100″ into the optic FOV (Field Of View) which is equivalent to lower 1/6 to lower 1/8.
True Co-Witness blocks half of your red dot visible window / FOV while Lower Third blocks one-third of your visible window / FOV.
Red Dot Industry Experts believe Back Up Irons should not be a vision blocker and should be as low as possible but still useable if needed.
LowWitness® Back Up Iron Sight heights provide you the lowest usable sight height without being a vision blocker “Everything you need, nothing you don’t”
DISCLAIMER: This product is not manufactured, authorized, endorsed,
or warranted by GLOCK. GLOCK does not warrant or represent that
this product is compatible with GLOCK pistols.
Michael Gascon (verified owner) –
After ordering the wrong set, when these arrived, I wasbsonstoked, Indecide to keep the other ones (for a direct mount slide cut) and just have a slide cut for them. I love the Low-witness sight picture, just enough if my RMRcc goes down for some fluke of a reason.
The rear sight has melted/radiused corners and are very comfortable for AIWB, even with a holster cut to allow a proper full-grip draw and not have your frontstrap riding the top of the belt like they’re its in heat.