Systema has their own wrench, which has a cut for the cylinder head and 2 pins welded on for the spring guide. But I bet it's hella expensive. A standard combination armourers wrench or even a barrel nut wrench + telestock tool will work fine.
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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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