BUIS Fits GLOCK 43/48 MOS w/ Optic Cut Upgrade for Holosun 407K / 507K – Tritium Front


Front Sight: .163″ Tall / .130″ Wide.  Tritium Front / Yellow Outline
Rear Sight: .163″ Tall / .150″ Notch.  Blacked Out Rear
For Use With But Not Included:
Pistol Model: GLOCK 43x MOS / 48 MOS Converted to Direct Milled(*) slide for Holosun 407k / 507k.  Click here to convert your slide to direct milling for Holosun 407k / 507k.
Optic Cut:  GLOCK 43 MOS / 48 MOS
Red Dot – Holosun 407k / 507k
These Iron Sights nearly a True LowWitness for the Holosun 407k / 507k.  These are slightly taller in order to allow to have Tritium inserted into the front sight.
*The OEM 43x MOS / 48 MOS optic cut is modified by removing the rear recoil posts and shortening the front recoil posts in order to allow the Holosun 407k / 507k to be mounted directly to the slide without the use of an adapter plate.

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.

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