Replacement aperture for C4 Rear Sight.
Features and Specifications:
Manufacturer Number: UD10910
Aperture: 0.070"
Note: This rear insert is the same size as the one included with the C4 Rear Sight. This is a replacement of your standard aperture.
Features and Specifications:
Manufacturer Number: UD10910
Aperture: 0.070"
Note: This rear insert is the same size as the one included with the C4 Rear Sight. This is a replacement of your standard aperture.
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