Replaces the rear sight on the M1 Carbine with a Weaver base for optics.

Features and Specifications:
Manufacturer Number: M101
Color: Black Anodized
Material: Aluminum
Length: 3.5"
Weight: 2.6 oz.
Replaces the rear sight.
Accepts all standard Weaver/Picatinny 1913 accessories

Fits:
Most .30 cal M-1 Carbines