BUIS Fits GLOCK 43/48 MOS w/ C&H Optic Plate for Holosun 407k / 507k Black Front and Rear


Front Sight: .175″ Tall Black
Rear Sight: .175″ Tall Black
For Use With But Not Included:
Pistol Model: GLOCK 43x MOS / 48 MOS
Optic Plate:  For use with the C&H GLX-HOLOk on the 43 MOS / 48 MOS
Red Dot – Holosun 407k / 507k
(3 customer reviews)

In stock

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.

Additional information






3 reviews for BUIS Fits GLOCK 43/48 MOS w/ C&H Optic Plate for Holosun 407k / 507k Black Front and Rear

  1. Ja (verified owner)

    I would have ordered the .225 height back up sights for my G43x along with the plate had I seen an image of the sighting system mounted before ordering. The plate and sights are undoubtedly of excellent quality, however I recommend potential buyers find a demonstrative image of the set up before selecting this specific height set. I acknowledge and in fact prefer the utility of very low back up irons, but these in particular, (the 0.175 to be clear), are too low to effectively use in conjunction with the 407/507k & the plate, in my humble opinion.

  2. schackney212 (verified owner)

    Perfect fit, almost like it came from Glock themselves. The shipping was quick.

  3. 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.

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