Barrel Kits let you customize and upgrade the heart of your PCP airgun’s accuracy, giving tuners and builders the parts they need to match a barrel to a specific pellet, slug, or caliber. This category includes precision components like FX Carbon Fiber Liner Sleeves and Superior Heavy Barrel Liners, designed to fit popular modular platforms and tighten your groups. Swapping or adding a liner can transform how a rifle shoots, opening the door to new calibers and projectile types without buying an entirely new gun.The right barrel components can unlock your rifle’s full potential. Browse the Barrel Kits selection at TopGun-Airguns to build out your setup.

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