Catalog entry
Action SL-MK4 220mm Barrel Kit Set
AIRSOFT PARTS, UPGRADES & ATTACHMENTS > INTERNAL AIRSOFT GUN PARTS > HOP UP & PARTS > SNIPER HOP UP PARTS
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Action SL-MK4 220mm Barrel Kit Set will allow you to change the inner and outer barrel of the older version of the SL-MK4. A longer inner barrel will allow for more power to be pushed out increasing the fps by 15%.
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