The Hammerli Force B1 features a tooless quick change barrel system, transition between barrel lengths and calibers 22 lR-22 WMR; adaptable magwell coordinates caliber changes with the correct Ruger magazine; adjustable stock offers tooless customization for length of pull and comb height; threaded barrel enables use of muzzle devices and suppressors; integrated Picatinny rail and trigger group compatible with Ruger 10/22 style trigger groups. Includes one magazine.