Is a Milled Slide the Move?

Published on June 23, 2025
Duration: 1:21

This guide, informed by an expert from GUNBROS, details the pros and cons of milling a handgun slide for an optic versus using a factory MOS (Modular Optic System) slide. Milling is recommended for users who know their desired optic, as it can offer a lower profile and eliminate potential plate system failures. MOS slides are presented as a more versatile option for those undecided on their optic choice.

Quick Summary

Milling a handgun slide for an optic is often preferred by users who know their desired optic, as it eliminates the plate system (a potential failure point) and allows for a lower optic mount. Factory MOS slides offer more versatility for users undecided on their optic choice.

Chapters

  1. 00:00Intro: Milled vs. Factory Optic Cut
  2. 00:24The Case for Milled Slides
  3. 01:06When to Choose MOS

Frequently Asked Questions

What is the main advantage of milling a handgun slide for an optic?

Milling a slide eliminates the optic plate system, which can be a point of failure. It also allows the optic to sit lower on the slide, providing a better profile and potentially more robust mounting.

When is a factory MOS slide a better choice than a milled slide?

A factory MOS (Modular Optic System) slide is generally a better choice if you are uncertain about which specific red dot optic you want to use. MOS systems offer more versatility for mounting different optic footprints.

What are the potential downsides of a factory MOS optic mounting system?

The primary downside of a factory MOS system is the optic plate. This system can be a failure point, especially under heavy use or harsh conditions, potentially leading to optic detachment or malfunction.

How does milling affect the optic's position on the slide?

Milling typically allows the optic to be mounted significantly lower on the slide compared to many factory MOS systems. This lower mounting height can improve the overall profile of the handgun and potentially enhance sight acquisition.

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