The Slidefire (and other similar bump-fire stocks) is basically a toy when used form the shoulder. A genuinely fun toy, to be sure, but still a toy. However, I have reason to suspect that when used on a rifle with a bipod and large ammunition capacity it might actually do a good job of duplicating a true light machine gun without the cost and NFA paperwork. (For folks who are not familiar with the concept, the stock allows the action to freely reciprocate in the stock. By holding one’s trigger finger in a set position and pulling the action forward,...