Arm Or Ally Duty Slide w/ RMR Cut For Glock 20

Arm or Ally Custom Duty Slide w/ RMR Cut for Glock 20 (10mm)

Precision-Built for Performance. Duty-Ready for Reliability.

Arm or Ally’s Glock 20 Custom Duty Slide is engineered for shooters who demand the ultimate blend of strength, precision, and optic-ready performance. Machined in the U.S.A. from premium 17-4 stainless steel, this slide exceeds OEM standards for fit, finish, and function—ideal for new builds or upgrading an existing 10mm Glock^® platform.

Custom Glock 20 Slide Features

• Match-grade tolerances tighter than factory specs for improved lockup and accuracy.
• Angled front and rear serrations for enhanced manipulation under stress or adverse conditions.
• RMR optic cut fits Trijicon RMR and Holosun 507C micro optics directly.
• Optional RMR cover plate (sold separately) for a clean, optic-free setup.
• Duty-grade design—no unnecessary ports or windows, ensuring reduced debris entry and improved slide strength.
• Unique Cerakote finishes available for custom appearance and superior corrosion resistance.
• Compatible with Glock 20 Gen 1–3 OEM and aftermarket parts, barrels, and guide rods.

Why Choose a Custom Glock 20 Slide from Arm or Ally

Unlike typical “show” slides, our Glock 20 Custom Duty Slide is built for professional-grade performance. Each unit is precision CNC-machined from American 17-4 stainless steel—the same material trusted in aerospace and defense components. The slide is heat-treated for wear resistance and coated in Cerakote for added protection against moisture and abrasion.

All Arm or Ally branded slides are manufactured in the same facilities as many high-end brands, offering the same craftsmanship at a fraction of the cost. These unbranded slides allow builders to create a clean, professional, and custom firearm setup without paying extra for logo engraving.

Optic Compatibility

This Glock 20 slide features a standard RMR footprint compatible with:

• Trijicon RMR, SRO
• Holosun 507C, 508T

*Note: RMRcc and Holosun K-series optics have different bolt spacing and are not directly compatible.

Specifications

• Material: 17-4 Stainless Steel
• Finish: Black Nitride or Cerakote (custom options available)
• Compatibility: Glock 20 Gen 1–3, 10mm
• Optic Cut: RMR pattern
• Weight: Factory equivalent
• Origin: Made in the U.S.A.

Arm or Ally Advantage

Our slides are built to duty standards—reliable, accurate, and ready for real use. They offer improved slide geometry, refined serration profiles, and premium machining at an unmatched value. Whether you’re upgrading your Glock 20 for home defense, duty, or range performance, Arm or Ally Custom Slides deliver everything you need—and nothing you don’t.