Dead Air DA402 P-Series Piston M13.5x1 LH Left Hand Thread Black

The Dead Air DA402 P-Series Piston delivers precision threading compatibility for suppressors requiring M13.5x1 left-hand thread pitch. This black-finished piston ensures proper barrel-to-suppressor alignment while maintaining the structural integrity needed for high-pressure centerfire applications.

What Makes This Different

Unlike standard right-hand threaded pistons, this left-hand variant accommodates European and specialty barrel threading specifications. The P-Series design incorporates Dead Air's enhanced sealing geometry that reduces carbon buildup and simplifies maintenance intervals. Manufactured to tighter tolerances than aftermarket alternatives, it maintains consistent lockup across temperature variations and extended firing schedules.

Key Features

• M13.5x1 left-hand thread pitch for European barrel compatibility
• P-Series enhanced sealing system reduces carbon fouling
• Precision-machined from heat-treated steel construction
• Black oxide finish resists corrosion and wear
• Compatible with Dead Air P-Series suppressor systems
• Self-timing design eliminates alignment guesswork
• Factory-tested dimensional accuracy within 0.001-inch tolerance

Field testing demonstrates reliable cycling across centerfire calibers from 9mm through .45 ACP in both semi-automatic and full-automatic applications. The piston maintains zero shift consistency through rapid-fire strings and extended suppressor use. Temperature cycling from -20°F to 400°F shows no dimensional changes that affect threading engagement or suppressor attachment security.

Technical Specs

• Thread Specification: M13.5x1 left-hand pitch
• Material: Heat-treated alloy steel
• Finish: Black oxide coating
• Compatibility: Dead Air P-Series suppressors
• Weight: Approximately 0.8 ounces
• Overall Length: 1.2 inches
• Manufacturing: CNC machined in USA
• Quality Control: Individual inspection and gauging

This piston addresses the specific threading requirements of European firearms and custom barrel applications where left-hand threads are specified. Dead Air's manufacturing consistency ensures drop-in compatibility without the fitting issues common with generic threading adapters.