Accessories for Glock 21

The Glock 21 is Glock's full size .45 ACP, with a wide double stack grip and a soft, pushing recoil. Many owners use it for home defence and bullseye style shooting, and the right sights matter for both, because each needs a different sight picture.

Aiming a .45

For slow fire, an adjustable LPA rear lets you zero precisely with your chosen bullet weight. For defence, a tritium set gives a sight picture in the dark. Both, and fiber optic options, are in Sights for Glock 21.

Optics ready

If your G21 has the MOS cover plate, swap it for a plate matched to your optic; Optics ready plates for Glock 21 lists them by footprint, from RMR to Acro.

Classic slide

On a slide without the cut, Red dot mounts for Glock 21 shows mounts that slide into the rear dovetail. They need no gunsmith and leave the slide untouched.

Frequently asked questions

Is the G21 grip too wide for a frame mount?

Frame mounts are not listed for the 21; the parts here are sights and optics.

Do .45 Glock sights differ from 9 mm?

Some do; buy those that name the G21.