Description
The Radian Afterburner and Ramjet for the SIG P365 XL is a matched barrel and micro compensator set, sold together, for P365 pistols with the 3.7 inch slide: the XL and the XMacro. Radian designed the system so a carry gun can run a compensator without a threaded barrel. The Ramjet has no threads. Radian’s Intra-Lok mount uses a tapered locking screw in the Afterburner that seats into an angled V-groove under the barrel, timing the comp and holding it without thread locker. Install is a barrel swap: remove the factory barrel, drop in the Ramjet, reinstall the recoil spring assembly, slide the Afterburner over the muzzle, and torque the screw to 15 inch pounds per Radian’s instructions. No shims or crush washer. One screw frees the comp for cleaning.
Radian machines the Ramjet from hardened 416R stainless steel and the Afterburner from hardened stainless steel; both wear Radian’s Radianite coating in black. Gas exits through one top port with no side ports, and Radian angles the front faces of the Afterburner to help it holster. Radian’s stated design goal for the system was reliable cycling with the stock recoil spring. Included: Ramjet barrel, Afterburner, Intra-Lok tapered screw, and a Torx bit.
Fitment: Radian lists this version for the SIG P365 XL and P365 XMacro, meaning the 3.7 inch slide on any grip module. Radian states it is not compatible with the P365 XMacro Comp (SIG’s integral comp slide) or with any P365 slide that has a loaded chamber indicator, because the Ramjet has no LCI cut. It will not fit the 3.1 inch P365 or P365X (Radian sells a separate version) or the P365 Fuse. Radian states fitment for factory SIG slides and publishes no list of approved aftermarket slides. The Afterburner only mounts to a Ramjet barrel.
Specs
- Fits: SIG P365 XL and P365 XMacro, 3.7 inch slide (factory slides without LCI)
- Caliber: 9mm
- Thread pitch: None (threadless Intra-Lok taper lock mount)
- Ports: One top port, no side ports
- Material: Barrel hardened 416R stainless steel; compensator hardened stainless steel
- Finish: Black Radianite coating
- Threaded barrel required: No; the Ramjet barrel is included and is not threaded
- Includes: Ramjet barrel, Afterburner compensator, Intra-Lok tapered screw, Torx bit
- Manufacturer part number: R0840
- UPC: 810098420662
- Made in: USA
Who it’s for
P365 XL and XMacro shooters in PCSL 2-Gun, Tactical Games, or USPSA Limited Optics who want a compensator that installs and removes with one screw and a match barrel in the same purchase.
Who should skip it
If your slide is the 3.1 inch P365 or P365X, buy Radian’s 3.1 inch version. If you own an XMacro Comp, SIG already built the comp into the slide and this will not fit. If you have a threaded XL barrel from the threaded barrels we carry for the SIG P365/XL, the Faxon EXOS for the P365 is the cheaper thread on option. Division rules: USPSA Production and Carry Optics do not allow a compensator, and IDPA SSP and CO do not either; IDPA CCP and ESP vary, so check the rulebook.
