Description
The Radian Afterburner Ramjet RXM is Radian Weapons’ threadless compensator kit for Ruger RXM. It pairs the RAMJET ported pistol barrel with the AFTERBURNER micro-compensator, joined by Radian’s INTRA-LOK taper interface. There are no muzzle threads to cut and no gunsmithing involved: the barrel drops into the slide and the compensator clamps to it. MAG5 Firearms stocks the black Radianite version under UPC 810098421539.
How the Radian Afterburner Ramjet RXM works
The Ramjet ported barrel is match-grade, cut-rifled and machined from hardened 416R stainless steel. It is fluted to shed weight and heat, and a gas sealing chamber sits behind the muzzle to route propellant gas into the compensator instead of letting it vent straight forward. Because the muzzle is left unthreaded, the Radian Afterburner Ramjet RXM stays usable in states that restrict threaded handgun barrels, and a loaded chamber indicator is cut into the hood.
The Afterburner micro compensator slides over that gas chamber and locks down on one tapered screw at 15 inch-pounds. That is what the threadless INTRA-LOK mount buys you: no thread timing, no crush washer, no thread locker to break free later, and the whole assembly comes back off in a couple of minutes. Radian rates the barrel and compensator together at a 44 percent reduction in felt recoil with 115-grain ammunition.
Radian Afterburner Ramjet RXM specifications
- Fitment: the 4″ Ruger RXM, which shares Glock 19 and Glock 45 slide dimensions
- Barrel: match-grade, cut-rifled, fluted, ported, non-threaded muzzle
- Barrel material: hardened 416R stainless steel
- Compensator material: hardened stainless steel
- Finish: Radianite black on both components
- Mounting: INTRA-LOK tapered screw, 15 in.-lb.
- Ammunition: 9mm, 115 grain and heavier
- In the box: Ramjet barrel, Afterburner compensator, tapered screw, TORX bit
Radian publishes the full fitment chart and torque figures on its own product page.
What the Radian Afterburner Ramjet RXM changes on the range
Ruger built the RXM around Glock 19 pattern pistol dimensions, which is exactly why a Ruger RXM compensator like this one exists at all. The RXM ported barrel drops into the factory slide the same way it would into a Glock, and the same accessories ecosystem opens up.
That compatibility is the RXM’s main argument, and it cuts both ways: parts are plentiful and cheap, but you are also buying into a pattern rather than something bespoke. For most owners that is the point.
Fitment and holsters
Check the fitment before you order, because these kits are not interchangeable between models or generations; the hood and lug geometry differ. This Radian Afterburner Ramjet RXM is cut for the 4″ Ruger RXM, which shares Glock 19 and Glock 45 slide dimensions, and nothing else. Radian builds separate part numbers for every other host pistol, and none of them cross over.
Because the 4″ RXM shares G19 and G45 slide dimensions, the assembled pistol lands at Glock 17 length and G17 holsters generally work. Confirm the fit rather than assuming, since RXM grip modules vary.
The honest caveats
A compensator is not free performance, and the Radian Afterburner Ramjet RXM is no exception. Redirecting gas upward makes the pistol noticeably louder to the shooter and to anyone standing beside you, and it throws more gas, unburned powder and particulate back toward your face. Indoors, or shooting from a compressed retention position, that is genuinely unpleasant.
Ported barrels and compensators also foul quickly. Expect to scrub carbon out of the Afterburner micro compensator far more often than you would clean a plain muzzle, and expect the Radian Afterburner Ramjet RXM to want cleaning on a schedule closer to a suppressed gun than a stock one.
Hanging a compensator on the gun also changes slide timing. Radian says plainly that the Radian Afterburner Ramjet RXM can require adjustment to recoil spring, lubrication or ammunition choice. Light 115-grain range loads are the floor the system is designed around, and anything weaker can short-stroke. If the pistol has a defensive role, put a couple hundred rounds of your actual carry load through it before you trust the setup.
Check local law as well. The Ramjet ported barrel ships unthreaded and is sold as fifty-state legal, but some municipalities restrict compensated or ported handguns, and several competition divisions bar them from stock classes. Because there are no muzzle threads, the Radian Afterburner Ramjet RXM is not a suppressor host either; if a can is in your future, buy a threaded barrel instead.
Who the Radian Afterburner Ramjet RXM suits
RXM owners who bought the pistol as a platform to build on. The RXM’s appeal is that Glock-pattern parts fit it, and this kit is a clear example of that paying off.
The Radian Afterburner Ramjet RXM comes off in minutes and leaves no permanent change to the pistol, so it is a reversible experiment rather than a commitment. If you run a Gen 6 Glock as well, we stock the all-black Glock 19/45 Gen 6 kit, and the Radian Glock 19 quick-tune guide rod is the usual companion for dialling recoil spring weight back in once the compensator changes the timing.
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