Engineered for maximum adaptability, the 155 RPX Suppressor from JK Armament delivers tool-free modularity and performance across pistol and rifle platforms. Designed to suppress calibers up to .30, it’s ideal for everything from subgun setups to .308 bolt rifles.
This suppressor features a Grade 5 titanium blast baffle for extreme durability at the muzzle and 7075-T6 aluminum for the modular core and outer tube sections—delivering an optimal balance of strength and weight.
In its shortest form, the 155 RPX measures just 3.5 inches and weighs about 4 oz, while the full-length configuration extends to approximately 9.2 inches and stays under 12 oz. The fully modular design allows for multiple configurations without tools.
It mounts via the industry-standard 1.375×24 HUB thread, ensuring broad compatibility with mounting systems, direct-thread adapters, and QD muzzle devices. The suppressor is full-auto rated and ships ready to run a wide range of cartridges, including 9mm, .300 Blackout, .308 Win, and more—depending on configuration.
Key Features:
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Caliber Compatibility: 9mm up to .30 caliber
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Length: 3.5″ (minimum) to ~9.2″ (maximum)
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Diameter: 1.55″
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Weight: ~4 oz (short) to ~12 oz (full)
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Materials: Grade 5 titanium blast baffle, 7075-T6 aluminum core and tube
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Mounting Interface: 1.375×24 HUB (mounts not included)
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Finish: Black anodized / Cerakote
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Serviceable: Yes – fully modular and user-configurable
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Full-Auto Rated: Yes (within configuration limits)
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Made in the USA
FAQ:
Q: Is the 155 RPX compatible with rifle calibers?
A: Yes, it’s designed for use with calibers up to .30, including .308 and subsonic .300 Blackout.
Q: What material is it made from?
A: It uses a Grade 5 titanium blast baffle and a 7075-T6 aluminum modular core and housing.
Q: Can I change the length easily?
A: Yes. It’s fully modular and reconfigurable without tools.
Q: What mounting options does it support?
A: It uses the HUB-standard 1.375×24 thread for maximum versatility.
Brought to you by Black Bayou Armory.





