Radian P365 Upgrades
Introduction
In this video, Caleb from Brownells walks through a full upgrade of the SIG P365 using Radian Weapons parts. The goal is to improve performance, reduce recoil, and make the pistol faster and more reliable for follow-up shots. The upgrades include the Radian Ramjet barrel and Afterburner compensator, a billet aluminum backstrap, a magwell, and upgraded base plates for the magazines.
While some argue that a 9mm pistol does not produce much recoil, these components are designed to improve control and accuracy, which is critical in both competition and defensive scenarios.
Radian Ramjet and Afterburner Overview
Radian’s Ramjet barrel and Afterburner compensator are already popular on Glock pistols, and now they are available for the SIG P365 lineup, including the P365 XL, P365 XMacro, and Tac Ops models. The system is designed to reduce muzzle flip, control recoil, and help shooters achieve faster and more accurate follow-up shots.
The compensator attaches to the barrel using a secure taper lock system rather than threads, making it reliable and consistent under repeated use.
Backstrap and Magwell Removal
The first step in upgrading the P365 is removing the factory backstrap and magwell. On models like the Tac Ops, the magwell is held in place with a Torx screw, while the backstrap is secured with a small pin. Using a Torx driver and a punch with a bench block, the stock components can be removed to prepare for the new Radian setup.
Installing the Radian Backstrap and Magwell
Radian’s upgraded backstrap and magwell are precision-machined from billet aluminum. They feature a dovetail fit with a spring and detent system that locks everything securely in place. The magwell not only improves reloading speed but also helps keep the backstrap secured to the frame.
Installation is straightforward: slide the backstrap into the dovetail, secure it with the magwell, and drop the detent and spring into place. If the magwell ever needs to be removed for cleaning or maintenance, Radian provides a takedown tool for easy disassembly.
Upgrading the Magazine Base Plate
Next, the factory magazine base plate is swapped for a Radian billet aluminum base plate. These base plates are designed to align seamlessly with the upgraded magwell, giving the pistol a sleek and integrated look. They are also highly durable, built to withstand repeated drops during range use or competition practice.
Installing the Ramjet and Afterburner Barrel System
With the frame upgrades complete, it’s time to install the Ramjet barrel and Afterburner compensator. The installation involves removing the factory barrel and recoil spring, inserting the Radian Ramjet barrel, and attaching the compensator using the included Torx screw.
The screw features a taper lock that keeps the compensator secure without the need for thread-locking compounds. The system aligns perfectly with the P365 slide, and after reinstalling the recoil spring and slide assembly, the pistol is ready for a function check.
Reassembly and Function Check
Once reassembled, the SIG P365 with Radian upgrades undergoes a quick function check to ensure proper operation. The magazine fits cleanly with the upgraded base plate, the slide cycles correctly, and all components lock into place as intended.
The upgraded pistol not only looks more aggressive with the compensator and billet components but is also expected to perform far better on the range by reducing muzzle rise and improving shot-to-shot consistency.
Final Thoughts and Range Expectations
Caleb closes by noting that the SIG P365 Radian build is more than just cosmetic. The Ramjet and Afterburner system is proven on other platforms, and there is no doubt it will deliver noticeable improvements in performance. The backstrap, magwell, and base plates add both durability and functionality, making this build ideal for shooters who want to push their P365 to the next level.
For shooters interested in upgrading their SIG P365 for concealed carry, competition, or range use, Radian’s parts are a strong option. As always, Brownells invites questions, comments, and feedback, and their tech line is available to help with installation and product support.
