When purchasing Jmac Customs Llc or any other brand from eGoods365.com store, you can be sure that (a) you are purchasing from US based company with the most responsive and friendly customer service; (b) an authentic, not a counterfeit and not a refurbished product.

Gas Block Combo


13 Collab with Sabrewerks13

With detent hole

This HAS 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 (available for purchase here – Windage Drum Front Sight Post

Available with detent and spring at 12 o'clock location. Accepts standard AKM spring and detent

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


JMAC recommends having a Kalashnismith install.