Primary Weapons Systems 1/2x28 Piston, Black

Primary Weapons Systems 1/2x28 Piston

Design Philosophy

Primary Weapons Systems was founded by firearm enthusiasts who recognized a fundamental problem: the standard direct-impingement AR-15 design requires extensive maintenance when subjected to high round counts and demanding conditions. After extensive testing across multiple rifle platforms—from M4s to AK-pattern rifles—the difference in maintenance burden became undeniable.

The Solution

This 1/2x28 piston represents PWS's answer to that challenge. The long-stroke piston system maintains the core values and ergonomics of the AR-15 platform while significantly reducing the maintenance requirements associated with high-volume fire and adverse environmental conditions.

Key Features

• 1/2x28 threading allows seamless integration with PWS suppressors and other compatible muzzle devices
• Anodized black finish provides durable corrosion resistance
• Long-stroke design reduces fouling and extends service intervals between cleanings
• AR-15 compatible maintains familiar handling and controls

Practical Benefits

Whether you're running high round counts at the range, training in challenging conditions, or simply prefer a rifle that demands less frequent maintenance, this piston system delivers measurable improvements in reliability and ease of operation.