Unleashed Solid Final Stage Kit for Nerf Strongarm This kit includes POM plunger rod, POM slam fire catch, POM trigger catch, polished metal trigger, 7+KG mainspring, silicone grease, o-ring, trigger, and trigger catch springs. When installed, the Strongarm shoots 95fps muzzle velocity with up to 65ft range (parallel to ground) and up to 75ft range (30 degrees angled to ground). Mod at your own risk! Increasing the spring tension can break or damage stock internal components of your blaster. Blaster not included.