Maximize the versatility of your Dead Air suppressor system with the P-Series Piston M13.5x1LH. Designed specifically for shooters who run multiple 9mm pistol hosts, this precision-machined piston delivers reliable cycling on tilting-barrel handguns featuring European metric left-hand threads. Key Features M13.5x1 LH thread pattern - Matches common factory-threaded barrels on Beretta 92 series, HK USP Tactical, and similar European 9mm pistols for a secure, direct fit. Steel construction with durable black finish - Resists carbon buildup and cleaning solvents while maintaining a tactical appearance that matches your Dead Air suppressor lineup. Lightweight 2 oz design - Minimizes added mass while providing the spring-loaded Nielsen device function essential for proper semi-automatic cycling. Quick-swap compatibility - Works seamlessly with the P-Series booster assembly (sold separately) to adapt your suppressor across multiple hosts in seconds, no tools required. Technical Specifications Thread Pattern: M13.5x1 Left Hand Caliber: 9mm Material: Steel Finish: Black Weight: 2 oz Compatible Suppressors: Wolfman, Ghost-45M, Ghost-M, Wolf-9SD, Primal (with P-Series adapter) Not Compatible: Odessa-9 Why Choose the Dead Air P-Series Piston M13.5x1LH Suppressor weight on a tilting-barrel pistol can prevent reliable cycling by resisting the barrel's rearward movement. This piston acts as a recoil booster, allowing the suppressor to move forward slightly during the unlock cycle so your slide operates smoothly. Whether you're building a multi-host suppressed setup or simply need the correct thread match for your European-barreled 9mm, this piston solves the compatibility challenge without compromising performance or requiring permanent modifications. Ideal for competitive shooters, tactical users, and enthusiasts who demand dependable function across diverse firearms, the P-Series piston expands your options while maintaining the precision engineering Dead Air is known for. Common Questions About Suppressor Pistons What is the purpose of a piston in a suppressor mount? A piston, also known as a Nielsen device or recoil booster, decouples the suppressor's weight from the pistol's barrel during the recoil cycle, enabling reliable semi-automatic function on tilting-barrel handguns. Which Dead Air suppressors work with this piston? This M13.5x1LH piston is compatible with the Wolfman, Ghost-45M, Ghost-M, Wolf-9SD, and Primal when paired with the appropriate P-Series adapter or booster assembly. Do I need the booster assembly separately? Yes, the P-Series booster assembly and spring are required and sold separately to complete the mounting system for your suppressor and host firearm.