I'm taking pictures for my Steel Barrel modification (hehe) but if you're interested, go running around to nerfhq.com and nerfhaven.com...those are two pretty good jumping off points into the world of foam.
Walmart has good prices on the NiteFinder and the Maverick, Targets mostly carry the full line if you want something bigger like a Titan, Big Bad Bow, or LongShot (although some walmarts have Longshots), and Kohls has cheap ammunition, AirTech 2000, and Secret Shot PB's.
Tutorial being posted soon
