Glock 21 red dot mount | Shield RMSc footprint

Red dot mount for Glock 21 models.

Replaces the rear sight and allows mounting red dots with Shield RMSc footprint. No slide milling or permanent modifications required. Full compatibility list is below.

Not for Glock MOS variants.

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.

Machined from durable brass and polymer in United Kingdom by Shield Sights.

This mount is compatible with the following models:

Compatibility with optics [best sellers]

This mount is compatible with the following popular optics:

You can find full list of compatible optics below.

This mount is compatible with the following red dots:

Installation of red dot mount can be done by yourself with basic manual skills and usual tools.

If you are not sure whether the product will fit your gun, or have any other questions, just drop us an email. We will check the compatibility and get back to you within 24 hours.