Jk Jk155Piston5X28Bn 155 Piston 1/2X28 9mm Blk
$99.75
The JK Armament 155 Piston is a 1/2x28 threaded piston assembly built for 9mm handgun applications. This component is engineered for shooters running suppressors on their 9mm pistols who need a reliable, precision-machined piston to cycle properly with their silencer system. JK Armament's piston design works with standard 1/2x28 suppressor mounts—the industry standard thread pattern for most 9mm cans—making it a straightforward swap for your current setup.
The 155 piston is constructed from nitride stainless steel, a finish that resists corrosion and handles repeated cycling without degradation. This matters because pistons live in a harsh environment inside your suppressor—they're exposed to hot gas, carbon buildup, and thermal cycling shot after shot. A durable, well-finished piston keeps your suppressor functioning reliably and makes maintenance easier down the road.
If you're running a 9mm pistol with a suppressor and your current piston is worn, cracked, or just not cycling right, this replacement unit gets you back to smooth, consistent function. It's a straightforward parts swap and a solid choice from a manufacturer known for precision suppressor components.
Key Features
- 1/2x28 threaded mount—compatible with standard 9mm suppressor platforms
- Nitride stainless steel construction for corrosion resistance and durability
- Designed specifically for 9mm Luger pistol suppressors
- Direct replacement piston assembly
Specifications
| Brand | JK Armament |
| Model | 155 Piston |
| Thread Pattern | 1/2x28 |
| Caliber | 9mm |
| Material | Nitride Stainless Steel |
| Application | Pistol Suppressor |
Frequently Asked Questions
Will this piston work with my 9mm suppressor?
This piston is built for 1/2x28 threaded suppressors designed for 9mm pistols. If your suppressor uses the 1/2x28 mount and is rated for 9mm, this piston should be compatible. Always verify your suppressor's specifications before purchasing a replacement piston.
What is a suppressor piston and why would I need to replace it?
A piston is the floating component inside a suppressor that helps regulate gas flow and cycling. Over time, pistons can wear, develop cracks, or become coated with carbon buildup that affects performance. A replacement piston restores reliable cycling and suppression function.
Is this a direct replacement part?
This is a 155 piston assembly from JK Armament. Confirm compatibility with your specific suppressor model before installation, as piston fitment can vary by manufacturer and suppressor design.
