DELTA O-RING PACK Manufacturer Model Number: AC87 Manufacturer: SilencerCo Model: Sparrow Type: Accessory-Silencer Accessories Item Type: Accessory Shipping Weight: 0.01 Feature: O-ring Package Total 4 Feature: Package Contains 2-#13 & 2-#18 Optic Adjustable Objective: false Optic Reticle Illuminated: false