Product Description The Rugged Suppressors Fixed Barrel Spacer is primarily designed to run .22LR through your Rugged Obsidian suppressor while expanding compatibility with fixed-barrel hosts. This spacer replaces the spring in the Obsidian booster assembly and is used together with a piston when mounting to fixed-barrel platforms such as carbines and subguns. It is not compatible with a 3 Lug Mount or a Fixed Mount. Product Highlights Designed for running .22LR with Rugged Obsidian suppressors Replaces the booster spring for fixed-barrel operation Use with a piston for fixed-barrel hosts such as carbines and subguns Improves versatility when swapping between host types Not compatible with a 3 Lug Mount or Rugged Fixed Mount Specs Brand: Rugged Suppressors Product Type: Fixed Barrel Spacer (suppressor accessory) Intended Use: Fixed-barrel hosts (for use with piston) Compatibility: Rugged Obsidian (primarily for .22LR use) Not Compatible With: 3 Lug Mount; Fixed Mount Manufacturer Part Number: SP001 UPC: 859383006471 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.