Converting Rifles
Since the .17 HM2 is based on the .22 Long Rifle converting most firearms chambered in .22 Long Rifle to .17 HM2 requires only a barrel change. The higher pressures makes conversion of semi-automatic firearms more difficult, as virtually all are blowback designs that are sensitive to pressure changes. Kits for the Ruger 10/22 and AR-15 platform have appeared, and they replace the factory bolt or bolt handle with a heavier one to increase the bolt mass and compensate for the higher pressure. Since the .22 Long Rifle is arguably the most popular cartridge in the world, the .17 HM2 has a large pool of potential firearms that could chamber it, and a huge infrastructure to manufacture the rimfire case it is based on.
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