HUXWRX RAD Piston M13.5×1 LH | MFG# 1981

The HUXWRX RAD piston (MFG# 1981) is manufactured from heat-treated 17-4 stainless steel with a black nitride finish to improve wear and corrosion resistance. It is designed to interface with HUXWRX RAD-series suppressors and to provide a secure, repeatable mounting surface via integrated wrench flats and M13.5×1 LH threads. The piston is offered as a direct replacement or upgrade for compatible RAD 9 and RAD 45 suppressors and is interchangeable with certain third-party pistons.

Product Specifications

• The manufacturer is listed as HUXWRX Safety Company.
• The model is RAD Piston.
• The manufacturer part number is 1981.
• The piston material is specified as 17-4 stainless steel (heat-treated).
• The exterior finish is a black nitride coating for enhanced wear and corrosion resistance.
• The thread pattern is M13.5×1 LH.
• The piston is listed to fit HUXWRX RAD 9 and RAD 45 suppressors.
• The part is noted as interchangeable with SilencerCo and Rugged pistons.
• The piston includes integrated wrench flats for more secure installation.
• The product is described as usable with reciprocating semi-auto handgun barrels (requires a piston spring) or fixed-barrel firearms (requires a fixed barrel spacer), listed as requires specific host setup.
• The product is listed as not designed to be disassembled.
• The finish type attribute is listed as Matte/Black.
• The package dimensions are listed as 7.0 x 4.0 x 1.0 (length x width x height).
• The NFA thread pattern attribute is shown as 13.5x1mm LH.
• The UPC for this part is 706433763382.

Built for durability and consistent function, the HUXWRX RAD piston provides a rugged interface between your host firearm and RAD-series suppressors. The combination of heat-treated 17-4 stainless steel, a black nitride finish, and integrated wrench flats makes installation straightforward and long-lasting in service environments where corrosion resistance and repeatability matter. Whether replacing a worn piston or upgrading to a tool-friendly install, this piston is specified for RAD 9 and RAD 45 use and offers cross-compatibility with established third-party pistons.