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YHM M13.5×1 LH Nielsen Pistons – Silver
Yankee Hill Machine Co Nielsen Pistons9mmM13.5X1LHStainless SteelCompatible with YHMs Booster Housing YHM-2055 as Well as Many Popular Pistol SuppressorsSilverFeatures:Weight: 1.40 ozNot compatible with Sidewinder suppressors17-4 Stainless Steel