PLEASE NOTE: These come stripped, they do not include the windage drum, front sight post, or barrel component pins. This does NOT 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 3.59oz