What's more fun than a 50 round mag dump for under $2 in ammo? With this setup, it's possible in your choice of two different guns. Black Dog Machine 50 round 22lr drum and feed towers for a ruger 10/22 or AR-15 w/22lr conversion or upper. Cost new was $60 plus $25 for the 10/22 tower. Looking for $65 cash or trades f2f on the west side of PDX. Trades??? = Gov. size 1911 7-8 round quality magazines, leather shoulder rig, 45 acp, 357, 223/556 ammunition or components. Open to other offers as well.