JK Armament 155 Piston (1/2x28, 9mm), No Mount, Black
- SKU: JK155PISTON5X28BN
- UPC: 850064482256
- Model:
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JK Armament 155 Piston, 1/2x28, 9mm, Black Nitride
The JK Armament 155 1/2x28 piston provides the barrel-thread connection inside a compatible JK pistol booster. The 9mm version is intended for a matching threaded pistol barrel and JK piston-mount assembly, making it the component to select when the booster housing is already available.
Choose the 155 Piston, 1/2x28, 9mm, Black Nitride at BattleHawk Armory.
Why Pistol Boosters Matter
Many short-recoil pistols need the barrel to move during cycling. A compatible spring-loaded booster allows the suppressor and barrel to move appropriately relative to one another, helping the pistol complete its operating cycle. The correct mounting system depends on the firearm; a spring-loaded pistol booster should not be assumed suitable for a fixed-barrel carbine.
The Barrel-Thread Component
The piston is machined from 17-4 PH stainless steel and has 1/2x28 barrel threads. The black nitride treatment provides a dark, durable surface. The piston fits within the compatible booster housing rather than threading directly into the suppressor's HUB interface.
Fitment Within the Complete Assembly
Use the piston with a compatible JK 155 piston-mount housing and a barrel that requires 1/2x28. The 9mm designation does not replace thread verification. Housing compatibility, suppressor bore, and the firearm's cycling requirements remain part of the selection.
Product Specifications
- Manufacturer: JK Armament
- Series: 155
- Component: Piston
- Finish: Black Nitride
- Barrel threads: 1/2x28
- Intended caliber group: 9mm
- Piston material: 17-4 PH stainless steel
Frequently Asked Questions
What components are included?
The piston only. A compatible JK booster housing and the suppressor are separate.
Will it fit every pistol suppressor?
No. Use the compatible JK piston system and verify the suppressor interface, internal clearance, bore rating, and host firearm requirements.
Can caliber alone identify the correct piston?
No. A barrel's actual thread pattern must match the piston. Pistols in the same caliber can use different muzzle threads.
Shop the 155 Piston, 1/2x28, 9mm, Black Nitride at BattleHawk Armory.
| Manufacturer | JK Armament |
| Pricing Unit | EA |
| UPC | 850064482256 |
| SKU | JK155PISTON5X28BN |
| Width | 3.9000 |
| Length | 4.2000 |
| Height | 1.3000 |
| Weight | 0.1000 |