Frank Semeraro is live! Saturday January 31st 2026

Published on February 1, 2026
Duration: 59:30

This guide details the process of building a custom Glock 21, drawing on insights from Frank Semeraro's experience. It covers selecting key components like the frame and slide, emphasizing the use of specific aftermarket parts for a custom build. The estimated cost and caliber are also highlighted, offering a practical approach for enthusiasts looking to assemble their own firearm.

Quick Summary

Building a custom Glock 21 involves selecting specific aftermarket parts like a Lone Wolf frame and a KM Tactical slide, with an RMR cut being a preferred feature. This project, chambered in .45 ACP, is estimated to cost between $300 and $350, offering a personalized firearm option for enthusiasts.

Chapters

  1. 06:36Glock 21 Build Project
  2. 28:29Glock Clones and Holsters

Frequently Asked Questions

What parts are recommended for a custom Glock 21 build?

For a custom Glock 21 build, Frank Semeraro recommends using a Lone Wolf frame and a KM Tactical completed slide, noting that an RMR cut on the slide is a desirable feature for modern optics.

What is the estimated cost for a custom Glock 21 build?

The estimated cost for assembling a custom Glock 21, using components like a Lone Wolf frame and a KM Tactical slide, falls within the range of $300 to $350.

What caliber is recommended for a Glock 21 build?

The .45 ACP caliber is specifically mentioned and recommended for the Glock 21 build project discussed, aligning with the traditional chambering for this model.

Are there alternatives to Glock mentioned for concealed carry?

Yes, for everyday carry, Frank Semeraro rotates between a Springfield Hellcat Pro for work due to its concealability and a Glock 29 in 10mm for general carry, discussing magazine capacity considerations.

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