A weapon in Gears of War that shoots up to 60 bullets in one magazine and when you melee with it, a chainsaw is activated. However, to get the chainsaw to work, you must have the B button down for longer than 1 second. The lancer is a strategic weapon and sometimes counters a shotgun. If you camp with the lancer and use chainsaw when people come by, i'm sure you'd get a decent ammount of kills with it.
Mike: Yo, I'm gonna camp with the lancer.
Scott: No dude, we need you at Boomshot!
Mike: Screw you
*Mike kills all 4 COGs with the chainsaw