On Nov 2, 2008, at 10:21 AM, Adam Frey wrote: > btw: For those that don't know, a blank round (ie, one that does > not fire a projectile) does not have enough backwards pressure to > push the bolt back. The AK-47 was not a good example. It is gas-operated. A better bet would be a recoil-operated gun, possibly one of the 9mms.