Description
The Radian Afterburner Ramjet Glock 43X is Radian Weapons’ threadless compensator kit for Glock 43X, sold as part number R0859. 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 810098420853.
How the Radian Afterburner Ramjet Glock 43X 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 Glock 43X 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 Glock 43X specifications
- Fitment: Glock 43X only
- 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 Glock 43X changes on the range
A Glock 43X compensator earns its keep because the host is light. Less mass means a faster, sharper recoil impulse, and the compensator flattens the part of it you actually see. The second shot lands sooner more than the first shot feels softer.
Be clear-eyed about the trade. A slimline 9mm barrel has less material around it than a double-stack, and this kit adds weight right at the muzzle of a pistol picked for being light and flat. That is the cost of the flatter tracking.
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 Glock 43X is cut for Glock 43X only, and nothing else. Radian builds separate part numbers for every other host pistol, and none of them cross over.
The G43X shares the G43’s slide length but not its grip, and holster makers treat the two separately. Check specifically for a compensated G43X shell; a G48 comp-cut holster is close but not the same, and a plain G43X holster will not close over the muzzle device.
The honest caveats
A compensator is not free performance, and the Radian Afterburner Ramjet Glock 43X 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 Glock 43X 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 Glock 43X 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 Glock 43X is not a suppressor host either; if a can is in your future, buy a threaded barrel instead.
Who the Radian Afterburner Ramjet Glock 43X suits
G43X carriers who want the flip of a thin 9mm brought under control without moving to a larger pistol. The 43X’s longer grip gives you more to hold onto, which pairs well with a compensator.
The Radian Afterburner Ramjet Glock 43X 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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