The CowCow A01 Silencer Adapter is a precision-engineered thread converter for pistol builds and custom upper receivers. Machined from stainless steel using CNC techniques, it solves the common compatibility challenge of matching barrel threads to suppressor and tracer units.
Key Features
- 11mm positive to 14mm negative thread conversion – adapts proprietary barrels to universal silencers
- Stainless steel construction – resists corrosion and maintains tight tolerances
- CNC-machined precision – ensures reliable fit and minimal wobble
- Knurled thread protector – improves grip and prevents accidental loosening
- Compact profile – minimal weight addition to your setup
Real-World Use Cases
Ideal for upgrading CowCow OB1 5.1 SS outer barrels or other 11mm-threaded builds. Works with most aftermarket silencers, suppressors, and tracer units on the market, giving you maximum choice when customising your pistol or compact rifle setup.
Technical Specifications
- Inlet thread: 11mm positive
- Outlet thread: 14mm negative
- Material: Stainless steel
- Manufacturing: CNC machined
- Finish: Silver polished
Compatibility & Upgrades
Compatible with CowCow OB1 5.1 SS barrels and any 11mm-threaded airsoft barrel. Accepts standard 14mm negative silencers, flash hiders, and tracer units from leading manufacturers. Requires no modifications to install—simply screw on and tighten with a 19mm spanner or adjustable tool.
UK Legal & Site Notes
Silencer adapters are legal to own and use in the UK under airsoft regulations. Always check your skirmish site’s rules before bringing upgraded components—some sites have restrictions on barrel length or aesthetic modifications.
Browse CowCow upgrades and adapters at Airsoftdirect to find the perfect fit for your build.







