HS-Armory Barrel Shims

These shims are designed to solve a common problem with most replicas that causes inaccuracy, poor inner to outer barrel fitment. The ends of inner and outer barrels normally aren't snug together and this allows the inner barrel move around in the outer, even the slightest movement can cause large fluctuations in the BB's trajectory. These small shims are designed to be wedged in that gap between inner and outer barrels to arrest any movement. Only one is needed per barrel and installation is as simple as wedging the shim in place between the inner and out barrels at the end of the gun and slicing off any excess with a knife. This is a pack of 2 so you can do two barrels.