If you’re a fan of Barrett rifles, you might be interested in a current auction on Gunbroker – The Outpost Armory has listed a prototype Barrett rifle, the M99A1, in .50BMG.

From the auction description:

This AWESOME, ONE OF A KIND M99A1, direct from Barrett Firearms Manufacturing is a great find for any gun lover! The M99A1 featured in this auction has never been sold to an individual; However, it has been used by the manufacturer. This unique prototype target rifle features a heavy barrel, additional picatinny rail, cleaning guide rod, adjustable match grade trigger group (this trigger group has never been used in a production Model 99), a bipod and a custom made benchrest forend . It also comes with an extra large carry case, the Pelican 1770 (54.58″ x 15.58″ x 8.63″). Barrett Firearms is providing a signed, personalized letter of authenticity to the winner of this auction.

It is important to note that there are no sales to California. The auction ends August 9, 2011.