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.
schackney212 (verified owner) –
Perfect fit, almost like it came from Glock themselves. The shipping was quick.
David Appl (verified owner) –
If you are looking for the perfect lower portion co-witness for your Glock 48 MOS + CHPWS plate + EPS Carry combo. these are the ones. I emailed the staff at CHPWS and they suggested these would be compatible for what I desired. They were spot on with the recommendation. I am unable to post pictures but they truly are the perfect usable height to just be barely over the rear of the reddot deck.