Browning | T-Bolt Magazine | 17 HMR | 22 Magnum | Black

Browning's T‑Bolt magazine uses a patented Double Helix rotary design -⁠- a torsion‑spring‑driven set of interlocking gears that keeps every cartridge in exact timing and alignment for genuinely smooth feeding, a real mechanical advance over a simple stacked box magazine. A translucent gray body lets you visually check your remaining round count without removing the magazine, and it holds a true 10 rounds. Built specifically to the caliber it's stamped for -⁠- .22 LR magazines do not interchange with the 17 HMR/22 WMR version, since the cartridges' different rim and case dimensions genuinely require separate tooling.