Rimfire Ammunition. Buy ammunition on sale online at discount prices online. We believe we have the largest ammunition inventory anywhere on online. We carry an extensive selection of ammunition from all manufacturers at discount sale prices. Use the caliber selector to choose your Caliber, Brand and Bullet Weight. Also try the Toggle View button to Switch from the standard view to a table view. Buy 10 units of any item and receive a 5% discount at checkout. No coupon needed.