.17 hmr.22 mag.22 wmr5.7×28 FN
The stainless steel 22Sparrow is rated and warrantied for use with all rimfire rounds, .22 diam and under such as .17 hmr and .22 mag. It is also rated for use with the 5.7×28 FN round.
The 22Sparrow is rated for full auto .22 lr machine guns.
41dB** tested with Walther P22, CCI Standard Velocity, 70 degrees, 5100’ elevation.
Alloy SteelHeat Treated 17-4 PH Stainless Steel