Anyone who advised that staking a BCG is unnecessary, and that it didn't make a difference that my CMT BCG wasn't staked properly, is officially on my **** list. Went to range today and first magazine went fine, the second one fired the first round and kept short stroking. At first I didn't realize it was short stroking so I thought the mag was bad, so I grabbed a pmag, and it did the same thing. It would fire the first round fine, then not feed the second round. I dropped the mag and looked at the top round, and the round had been scrapped, but not fed. I called my AR guy, and he asked me to check the gas key. Bingo! It was more loose than a hooker on nickel night I tightened the allen screws, finished my session flawlessly, and headed up to him and he properly staked the BCG for me. The gun only had about 190 rounds through it when the gas key came loose, so it didn't come loose from over use. So, long story short, proper staking is necessary!!