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The Knight's Armament SR25 gas block suppressor locating pin is used in most SR25 gas blocks. These are replacements and can be used with the M110 double high gas blocks. The number required will depend on the gun and suppressor being mounted. For the M110 only one is used on the bottom of the gas block, others use them on top of the gas block.
Specifications:
Suppressor locating pins are sold individually.