I have a AR-7 though the M6 is a lot better weapon and more durable. But I do like how compact the AR-7 is but it's finicky with ammunitions. I was thinking about using my Delta Storm instead, but the AR-7 is more compact. The Delta Storm I wouldn't have to worry about ammunition but it's for small game and you have to have be a good shot.

Here's a start try here:
http://www.gunshopfinder.com/springfield/M69201.asp
http://www.gunsngals.com/Item.aspx?PID=8634
http://www.auctionarms.com/search/displayitem.cfm?ItemNum=7982591
http://www.gunrunnerauctions.com/listings/details/index.cfm?itemnum=862516017