KM Tactical MK3 RMR Cut Slide for Glock 21 (Gen 1-4) – .45 ACP

KM Tactical MK3 RMR Cut Slide for Glock 21 (Gen 1-4) – .45 ACP

Upgrade your G21 with the KM Tactical MK3 Slide, the latest evolution in our high-performance Glock aftermarket line. Featuring a fully stippled slide body, the MK3 is engineered for the .45 ACP platform, combining aggressive aesthetics with superior handling.

Performance-Driven Design & Enhanced Grip

The MK3 stands out with its integrated stippled texture along the slide body. This isn’t just for looks—the stippling provides an additional point of contact for a more secure grip during press checks and malfunctions.

• Functional Porting: The top-side ports align perfectly with ported barrels for flatter shooting and reduced muzzle flip.
• Tactical Serrations: Front and rear serrations, complemented by 10 and 2 o’clock dimpling, ensure positive slide manipulation in all environments.
• Stippled Body: Provides a unique, custom-shop aesthetic with a high-friction surface for maximum control.

Precision Engineering & Optics Ready

• Optic Cut: Pre-machined for the Trijicon RMR footprint (includes 6-32 tapped retention holes).
• Weight Reduction: At just 12.5 ounces, the MK3 is 20% lighter than standard slides, allowing for faster cycling and reduced reciprocating mass.
• USA Made: 100% manufactured from 416 Stainless Steel, heat-treated to 42-44 HRC for lifetime durability.

Product Specifications:

• Compatible Model: Glock 21 (Gen 1, 2, 3, and 4*)
  • Utilizes a Gen 3 Upper parts Kit
• Caliber: .45 ACP
• Finish: Corrosion-resistant Black Nitride
• Material: 416 Stainless Steel
• Optics Footprint: Trijicon RMR / Holosun 507C
• Sights: Standard Glock sight dovetails
• Weight: 12.5 oz
• Overall Length: 7.5″
• Optional Cerakote Available

Note: For a seamless look, pair this slide with our Full-Width RMR Cover Plates or our Gen 2 Large Frame RMR Plates, specifically designed for large-caliber frames (G20/G21/G40).