Custom Sig P320 X Compact Full Build Review (again)

Published on June 22, 2025
Duration: 7:00

This video details a custom Sig P320 compact build, focusing on replacing the OEM frame with a Mischief Machine model featuring a 1911 grip angle and G10 panels. It also covers the installation of a Sig Sauer Romeo 1 Pro optic, a Harrington Arms compensator, and a Streamlight TLR 7A light, highlighting the ease of assembly and improved ergonomics.

Quick Summary

This custom Sig P320 compact build features a Mischief Machine frame for improved ergonomics and a 1911 grip angle. It's equipped with a Sig Romeo 1 Pro optic for a wide sight picture and a Harrington Arms compensator for flatter shooting, along with a Streamlight TLR 7A light.

Chapters

  1. 00:00Intro & Nostalgia
  2. 01:49Custom Sig P320 Compact Build Overview
  3. 02:38Base Gun & OEM Frame Issues
  4. 03:02Mischief Machine P320 Frame Review
  5. 04:08Sig Romeo 1 Pro Optic
  6. 04:33Sig P320 Barrel & Harrington Arms Comp
  7. 05:10Harrington Arms Mag Extensions
  8. 05:24Streamlight TLR 7A Light & Holster
  9. 05:54Final Build Impressions
  10. 06:15Range Day Invitation & Training

Frequently Asked Questions

What are the key components of this custom Sig P320 compact build?

The custom build features a Sig P320 compact base, a Mischief Machine frame with a 1911 grip angle, a Sig Sauer Romeo 1 Pro optic, a Harrington Arms compensator, and a Streamlight TLR 7A light.

Why was the OEM Sig P320 frame replaced?

The reviewer found the OEM Sig P320 frame to be aesthetically unappealing and uncomfortable, preferring the ergonomics and 1911 grip angle offered by the Mischief Machine frame.

How does the Harrington Arms compensator affect the Sig P320's performance?

The compensator, when used with the 4.3-inch threaded barrel, helps the P320 shoot flatter, reducing muzzle flip, which is noticeable in slow-motion playback of shooting footage.

What are the advantages of the Sig Sauer Romeo 1 Pro optic on this build?

The Romeo 1 Pro offers a wide sight picture, convenient top-access battery, side buttons, and perfectly co-witnesses with the iron sights, enhancing usability and aiming.

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