Didn't want to hijack the other thread about our "friends" at the BATFE, but the phrase "Upon further review" reminds me of a friend who is still in the process of getting royally screwed by the ATF. Ever hear of Bill Akin? The Akin's Accelerator? That's a type of "bumpfire" device that Bill was given the go ahead (by ATF) to develop and market. Ran great, too. I know Bill, and have shot with him. Long story short, Bill sank a lot of money into R&D, tooling and production and sales, etc. Only to have the BATFE pull the rug right out from under him UPON FURTHER REVIEW. There's a pretty good explanation and video of one of the 10/22's being fired on Wikipedia. Sweet concept, and as said, done with ATF approval at first. Damned shame what THEY can do!