Gas Block Combo With Detent Hole

PLEASE NOTE: These come stripped, they do not include the windage drum, front sight post, or barrel component pins. This have a Detent Hole in the Front. GBC-13 is a copy of the East German 74nk Front Sight Gas Block Combo Perfect for Pistol, SBR, and Rifle builds to lighten up the front end and give it a custom look Fits common 0.591" gas block barrel journals Has 90* gas port and is a direct replacement for most 90* gas blocks, will work on 45* gas ports with minor gun-smithing Uses standard front sight windage drum and pin Has built in cleaning rod holder Cast in the US using Wax Casting techniques similar to the modern Russian barrel components Machined in the US 4140 Heat Treated to Rockwell 32C Black Nitrided in the US Weight 3.4 oz.