Armed For Bear

Armed For Bear is a three-star (★★★) challenge added by the Fallout: New Vegas add-on Gun Runners' Arsenal.

Challenge requirements
Kill any 15 named NCR Rangers or commissioned officers (Lieutenant, Captain, Major, Colonel, General) using a machete, Ripper, chainsaw, throwing spear, or ballistic fist.

Bugs

 * When using throwing spears for a kill, be sure to have at least two. The game checks what weapon you are holding *after* the kill is made, if you throw your last spear it sees your attack as having been unarmed and does not count it towards the challenge.