The .277 Wolverine is a 5.56 NATO based wildcat that was designed to give near 6.8 SPC performance out of an AR-15 type rifle, without requiring a specialized bolt or magazines. Since the Wolverine only requires a barrel change, it is one of the most affordable AR conversions. This is touted as an all-purpose cartridge that not only gives excellent down range performance for its size, but it is also well suited to pistol or SBR, and subsonic/suppressed applications.
Barrels are available for Savage bolt actions and AR’s, as well as dies and other accessories from Mad Dog Weapons Systems .
**WARNING** In firearms that use a floating firing pin (such as the AR-15 and its variants), dropping the bolt on a chambered round could lead to a slam fire. It is important that these firearms are loaded from the magazine so that the bolt loses inertia when it strips a round from the magazine. It is also important NOT to use sensitive primers that aren’t designed for use in an AR, as this increases the chance of a slam fire.