CZ 455/457 .17 HM2 (M2) NF (no flutes), TH (.500 x 28 TPI threaded muzzle-end w/protective cap) Solid anodize .920 Barrel. Barrel interchangeable with the new CZ 457 model.
requires a scope and a bull barrel gunstock.
ACCURACY BLEM: barrel is .002-.005 non-concentric that produces some occasional fliers generally to the right but also on target (target picture). If you are willing to live with some fliers. great price on the barrel.