Cart “40 mm M-79-203. adapter for 20 gauge bird bombs. You will need to supply your own 20 gauge barrel to fit inside the adapter.” has been added to your cart. Continue shopping Remove item Thumbnail image Product Price Quantity Subtotal 50 cal crimp type blank in 50 caliber can. 100 round can. $499.99 50 cal crimp type blank in 50 caliber can. 100 round can. quantity $499.99 40 mm M-79-203. adapter for 20 gauge bird bombs. You will need to supply your own 20 gauge barrel to fit inside the adapter. $99.95 40 mm M-79-203. adapter for 20 gauge bird bombs. You will need to supply your own 20 gauge barrel to fit inside the adapter. quantity $99.95 Coupon: Apply coupon Update cart Cart totals Subtotal $599.94 Tax $0.00 Total $599.94 Proceed to checkout