JMac Customs GBC-13-With Detent Hole
This does have a Detent Hole in the Front
- 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 gunsmithing
- Uses standard front sight windage drum and pin
- Available with detent and spring at 12 o’clock location
- 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
GBC-13 is a copy of the East German 74nk Front Sight Gas Block Combo
It all started with a high definition scan of an original part from Larry Vickers, then we teamed up with Sabrewerks13 to oversee the casting process, and finally back to JMac Customs for machining.
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