Product Description The Rugged Suppressors OA005 3-Lug Adapter is designed to convert a 9mm Luger barrel with 1/2x36 threads to a 3-lug interface for fast, repeatable suppressor mounting. It features Rugged&';s patented Go/No-Go Gauge to help confirm your suppressor is properly attached for a surprise-free shooting experience. Manufactured to 9mm H&K specifications and finished in black, this adapter is intended for 9mm use and is not compatible with .45 ACP. Product Highlights Patented Go/No-Go Gauge helps verify proper suppressor attachment Converts 1/2x36-threaded 9mm barrels to a 3-lug mounting interface Made to 9mm H&K specifications for compatible 3-lug setups Durable black finish for hard-use suppressor accessory applications Designed for 9mm Luger; not compatible with .45 ACP Specs Brand: RUGGED SUPPRESSOR Manufacturer Part Number: OA005 UPC: 859383006723 Type: 3-Lug Adapter / Barrel Adapter Caliber Compatibility: 9mm Luger Thread Pitch: 1/2x36 Gauge Feature: Go/No-Go (patented) Specification: Made to 9mm H&K spec Color: Black Compatibility Note: Not compatible with .45 ACP Weight: 0.08 lb Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.