S$W M&P in 5.45x39
http://www.budsgunshop.com/catalog/product_info.php/products_id/55424
Remember, this ammo(AK 74) is 1/2 the price of .223 with similar ballistics. (Looks like the price is up about $25 a case)
Thanks for the info on the less expensive ammo. It’s half the cost of the .223.