2013 31ft Keystone Bullet Premier Bunkhouse Model for sale. The trailer will be a year old this April and Sleeps 12! This is a beautiful trailer with all the bells and whistles. Exterior Includes: Outdoor kitchen, exterior speakers, outdoor shower, power jack, electric awning, exterior pass through storage, seamless tinted windows and it also has a "thermal Package" with an enclosed heated underbelly. Trailer also comes with Custom Winterized Skirting.