Sig P320 X5 LEGION - The Ultimate Build

Published on February 6, 2020
Duration: 20:08

This guide details the process of building a custom Sig P320 X5 Legion from an 80% MUP-1 module. The build focuses on achieving a flatter shooting platform than the stock X5 Legion by incorporating specialized aftermarket parts like a Norso slide, Faxon barrel, PMM compensator, and DPM recoil system. The expert-level instruction highlights the importance of precise assembly and component selection for optimal performance, including a refined trigger pull between 3.1-3.5 lbs.

Quick Summary

Building a custom Sig P320 X5 Legion from an 80% MUP-1 frame offers a cost-effective path to a high-performance firearm. Key components include a Norso slide, Faxon barrel, PMM compensator, and DPM recoil system, aiming for a flatter shooting experience and a trigger pull between 3.1-3.5 lbs.

Chapters

  1. 00:17Build Introduction & Goal
  2. 01:5580% P320 Modules & Jig
  3. 03:04Parts Overview
  4. 05:30Trigger and Internals
  5. 06:14Recoil System and Slide
  6. 06:52Compensator and Barrel Installation
  7. 08:36Frame Features Analysis
  8. 10:09Cost Analysis
  9. 12:31Trigger Pull Testing
  10. 15:55Final Assessment

Frequently Asked Questions

What are the key components for building a custom Sig P320 X5 Legion from an 80% frame?

A custom Sig P320 X5 Legion build from an 80% frame typically includes an MUP-1 insert, Sig X5 Legion tungsten-infused grip, Norso compact slide, Faxon Firearms barrel, PMM dual-port compensator, and a DPM Systems recoil reduction kit.

How does the custom Sig P320 X5 Legion build compare in cost to a stock model?

Building a custom Sig P320 X5 Legion from an 80% module is generally more cost-effective if the goal is to achieve a specific high-performance configuration with aftermarket parts, compared to buying a stock Legion and performing similar upgrades.

What is the typical trigger pull weight for a custom Sig P320 X5 Legion build?

A well-executed custom Sig P320 X5 Legion build, incorporating parts like an Apex Tactical trigger bar and specific springs, can achieve a trigger pull weight between 3.1 and 3.5 pounds, offering a significant improvement in feel and performance.

What advantages does the tungsten-infused grip offer on the P320 X5 Legion?

The tungsten-infused TXG grip module, along with an internal tungsten weight, adds mass to the firearm. This increased weight helps to significantly reduce felt recoil and muzzle flip, resulting in a flatter shooting experience and improved control.

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