I don't recall if this has already been posted.   " Here’s an unexpected find from the Bond Arms booth at SHOT Show. This unnamed lever gun prototype is compatible with standard AR-15 uppers and mags, as well as Remington 870 shotgun stocks. The mechanism includes a unique asymmetric cam that generates variable leverage on the bolt to smooth out moments of higher resistance (i.e. feeding from the mag). The lever also has dovetails that allow the loop to be swapped out to