When looking for adjustable gas blocks look for one that is adjustable from the front of the block. Otherwise you have to leave the handguard off until your done adjusting and if you need to make any further adjustments you will have to take the handguard off again.
Writing from the gateway to the great BluMtns in southeastern Washington.
Just remember, "You are the trailer park and I am the tornado". Beth Dutton, Yellowstone.
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