4.5" CHARGER STANDARD LR NF TH w/Cap Black Matte
LR (long rifle) NF (no flutes), TH (1/2" x 28 TPI threaded muzzle-end w/protective cap) Solid anodize .920 Barrel.
Popular length when adding a silencer on a BATFE licensed Short Barrel Rifle (SBR).
An SBR is a rifle with a barrel less than 16 inches. A Rifle is considered a barrel length of 16-26 inches long. Pistols, (like 22 Charger™) on the other hand, are firearms designed to be gripped by one hand.