Complete GLOCK® 21 Compatible Pre-Assembled Slide – RMR Optic Cut – Black Nitride

Description

Pre-Assembled GLOCK® 21 Compatible RMR Slide [Slide + Barrel + Upper Parts Installed]

Big-bore builds deserve a slide that’s ready to run. This full-size .45 ACP slide arrives completely assembled, with the barrel and a Gen 3 upper parts kit already installed, so you can skip the bench work and go straight to sights and optic. Front and rear serrations keep manipulation positive, the matte Black Nitride finish stands up to holster wear, and the RMR cut puts a red dot on your G21 without adapter plates. Made and assembled in the USA.

Compatibility

Fits GLOCK® 21 Gen 3 compatible frames, including factory Gen 3 G21 pistols and full-size .45 ACP 80% frames built to Gen 3 G21 specs. Accepts GLOCK®-pattern sights and RMR-footprint optics.

Optics and RMR Cut Fitment

The RMR footprint is the most widely supported pistol optic cut out there, so you won’t be stuck hunting for adapter plates. Mount a Trijicon RMR, a Holosun (like the 507C X2), a Swampfox, or any other RMR-pattern red dot directly to the G21 slide with the included 6-32 tapped holes.

What’s Included:

Slide

Machined from 416 stainless steel billet to GLOCK® OEM internal dimensions and finished in Black Nitride, this full-size slide carries front and rear serrations, factory sight cuts, and an RMR optic cut.

• Platform: GLOCK® 21 Gen 3
• Caliber: .45 ACP
• Material: 416 Stainless Steel
• Hardness: 42-44 HRC
• Finish: Black Nitride
• Features:
  • OEM internal dimensions
  • RMR optic cut w/ 6-32 tapped holes
  • Front & rear serrations
  • Factory GLOCK® sight cuts

Barrel

• Caliber: .45 ACP
• Length: GLOCK® 21 Standard
• Finish: Black Nitride
• Pre-installed and function-ready

Pre-Installed Upper Parts

• Firing pin
• Firing pin spring
• Firing pin spring cup
• Firing pin safety
• Firing pin safety spring
• .45 ACP Extractor
• Extractor depressor plunger
• Extractor depressor plunger spring
• Channel liner
• Spacer sleeve
• Steel cover plate
• Polymer guide rod (guide rod, washer, screw)
• Guide rod spring

Ready to Install

Everything comes installed and function-ready. No assembly required; add sights (and an optic if you’re running one), then install the slide on your frame. Sights, optic, and frame are sold separately.

Complete Your Build

• Pistol Red Dots
• GLOCK® Sights
• GLOCK® Magazines

 

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