The gas block for a piston system is proprietary. You don't just "get one to fit the gas block you have".
If you are after a realistic build, get the proper piston system with it's proper gas block. Many of them are railed, so then you can add your own flip-up to taste.
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Age verifier Northern Alberta
Democracy is two wolves and a sheep discussing what's for dinner.
Freedom is the wolves limping away while the sheep reloads.
Never confuse freedom with democracy.
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