SPR THUMBNUT MOUNT 1" Manufacturer Model Number: 48376 Manufacturer: Weaver Model: SPR Thumbnut Mount Type: Accessory-Rings/Mounts/Bases Item Type: Accessory Finish: Black Weight: .55 lbs. Shipping Weight: 0.55 Feature: 1" Feature: Cantilever AR Mount Optic Adjustable Objective: false Optic Reticle Illuminated: false