User blog comment:Affectos/Showdown at Sunset: THE FOREIGNERS Kyofu (BeastMan14) vs. Synderen (Undead RVD)/@comment-4476906-20130625023101/@comment-72.35.126.252-20130625053352

The "Mare's Leg"  shotgun is probably a reference to the Winchester 1887 shotgun in a Mare's Leg style configuration like the one used in Terminator 2.