The COWCOW Technology 140% steel hammer spring for the TM G series GBB pistol is a heavier, stronger, higher quality hammer spring upgrade over the stock spring found in the original out of the box gun.
The COWCOW Technology 140% steel hammer spring for the TM G series GBB pistol is a heavier, stronger, higher quality hammer spring upgrade over the stock spring found in the original out of the box gun.