Our pistons are engineered for versatility, allowing quick and easy changes to accommodate different host firearms and calibers. Each piston is precision-machined from 17-4 stainless steel and heat-treated to ensure maximum durability and longevity. As a critical component of the Nielsen device, the piston facilitates proper movement and enables reliable semi-automatic cycling for unlocking pistol barrels. For use with fixed barrel firearms, simply add a Fixed Barrel Spacer to optimize performance. Designed with female threading, SilencerCo pistons seamlessly attach to SilencerCo threaded barrels, providing a secure and reliable fit for enhanced suppressor functionality.

XL pistons are ideal for firearms that require additional length between the threaded barrel and the silencer, improving fit and performance

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It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).