The Sylvan Arms Silent Capture Bolt Extension is hollowed out allowing you to run silent capture buffer spring systems with our Gen 3. Folding Stock Adapter. Designed for a 5/8 (.625) in. ID Bolt Carrier. Make sure that this will fit your configuration before purchasing!
Compatible with the following Silent Capture Buffer Spring Systems
- JP Enterprise Silent Captured Springs
- Armaspec SMB Sound Mitigation Buffer
- O-ring Diameter: .645 in. Designed for a 5/8 (.625) in. ID Bolt Carrier
- Inside Diameter: .469 in.
- Length: 3.423 in.
- Weight: .6 oz.
- Material: 6061-T6 Aluminum
- Finish: Black Anodized
- Comes with 3 same size O-rings
If have any questions, feel free to contact us before ordering!