I ordered these two Beta Max drums back on March 8th. and they finally arrived last Friday, June 14th. Sure worth the wait as far as I am concerned. Anything that can throw 100rds. of 5.56/.223 out as fast as these do can only be good. These are not the cheap Korean knock off's but American made by Beta-Max and guaranteed for 60,000 cycles, like anyone could ever track that many rounds. These along with my Colt M4 with a Slidefire stock should throw out some damn good defense.