Rugged Piston M13.5×1 LH | 17-4 SS | Copper

The Rugged Suppressors Piston M13.5×1 LH is a replacement/service piston designed for use with the Obsidian 45 suppressor. It features a non-slotted design that produces a full circumference gas seal to lower gas blowback during firing. Machined from heat-treated 17-4 stainless steel with a copper finish, it is built for durability and consistent performance. This part is threaded for left-hand M13.5×1 fittings and intended for suppressor-equipped shooting applications such as extended range training and maintenance/assembly of suppressor systems.

Product Specifications

• The thread pattern is M13.5×1 LH tpi for left-hand installations.
• The material is 17-4 Stainless Steel that has been machined and heat treated.
• The exterior finish is Copper.
• The product is intended to fit Obsidian 45 suppressors.
• The design type is a non-slotted piston creating a full circumference gas seal.
• The listed model name is Suppressor Piston.
• The handedness is Left Hand.
• The overall dimensions are 1.45 x 1.55 x 2.60 inches (H x W x L as provided).
• The reported weight is 0.1 (unit as provided).
• The country of origin is US.
• The product type is Piston classified under suppressor accessories.
• The UPC is 859383006303.

Built for shooters who prioritize reduced gas blowback and longevity, this piston provides a robust sealing surface and durable construction for routine range use and suppressor maintenance. Note that on fixed-barrel platforms such as carbines or subguns a fixed barrel spacer must be used in place of the spring; follow the host manufacturer’s guidance for installation and compatible parts. The part’s copper finish and 17-4 stainless construction make it a straightforward upgrade or replacement component for Obsidian 45 owners seeking consistent performance.