Building Perfect Sig Chassis

Published on March 9, 2026
Duration: 1:04

This guide details the process of upgrading a Sig P365 X Macro chassis with the Radian Afterburner + Ramjet barrel and compensator system. It covers disassembly of the original slide, installation of the new barrel assembly, and reassembly onto the chassis. The video demonstrates precise techniques for modular firearm upgrades, suitable for intermediate builders.

Quick Summary

The Radian Afterburner + Ramjet is an aftermarket upgrade for the Sig P365 series that integrates a barrel and a compensator. It's designed to improve recoil management and enhance the firearm's aesthetics, offering a significant performance boost over stock components. Installation involves disassembling the original Sig P365 slide and replacing the factory barrel.

Chapters

  1. 00:00Displaying build components
  2. 00:01Unboxing Radian Afterburner Ramjet
  3. 00:04Examining Radian barrel compensator
  4. 00:11Disassembling Radian Afterburner
  5. 00:20Chassis assembly FCU slide
  6. 00:27Disassembling P365 slide
  7. 00:32Radian barrel comparison P365
  8. 00:41Installing Radian barrel and slide
  9. 00:49Attaching chassis stock
  10. 00:52Final P365 chassis build

Frequently Asked Questions

What is the Radian Afterburner + Ramjet system?

The Radian Afterburner + Ramjet is an aftermarket upgrade for the Sig P365 series that integrates a barrel and a compensator. It's designed to improve recoil management and enhance the firearm's aesthetics, offering a significant performance boost over stock components.

How do you install the Radian Afterburner on a Sig P365?

Installation involves disassembling the original Sig P365 slide, removing the factory barrel and recoil spring, then installing the Radian Afterburner barrel into the slide and reassembling the slide onto the FCU within the chassis. A hex tool is typically required for initial disassembly of the Radian components.

What components are shown in the Tactical Advisor video for the Sig P365 build?

The video showcases the Sig P365 X Macro chassis, the Radian Afterburner + Ramjet barrel and compensator system, and a Vortex Defender CCW optic. A folding stock accessory is also attached to complete the build.

Is the Radian Afterburner a direct replacement for the Sig P365 barrel?

Yes, the Radian Afterburner barrel is designed as a direct drop-in replacement for the factory barrel on compatible Sig P365 models. It integrates a Ramjet compensator, requiring specific disassembly and reassembly steps.

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