Meet the Bumpski. Today I had a chance to test fire this street legal bump firing mechanism on both an AK47 semi-auto in 7.62x39 and a PSL in 7.62x54R. Here is a link for the video below.
Now I am on record as an advocate of long-range semi-auto aimed fire. Still, there is a role for suppressive fire -- when facing an enemy that is numerous or subject to the psychology of being on the receiving end of aimed, full auto fire -- however Class III weapons are out of the price range of most folks and the licensing restrictions are onerous, to say the least. I have friends who like to piss away ammo bump firing their AKs by hand, but the problem is that this is usually from the hip and hardly accurate even at fifty meters. It is suitable for fighting a Chinese People's Liberation Army human wave assault in an alley I suppose, but not much else.
Now the folks at Bumpski have come up with a stout and reliable aluminum bump firing mechanism which uses no springs (which would make it illegal) yet with a little practice is quite controllable from the shoulder. Here is a review with a bit of technical explanation.
The device is heavy, being of solid aluminum, yet this aids in control. It is difficult to retrain your reflexes to use the Bumpski, but a little practice teaches you to put gentle forward pressure on the front hand guard (a vertical grip helps in this, although we were able to make it work easily with standard hand guards).
Semi shots are still available by using the trigger without the Bumpski device, although it does get in the way somewhat. Again, a matter of training should solve most problems.
The cyclic rate of the AK we tried compared favorably with a standard full-auto AK, and the PSL worked like a BAR on slow-rate. Unfortunately we did not have a Saiga shotgun to try the device on.
The biggest drawback is that the Bumpski costs as much as an AK to mount it on, but even so, the factory is selling out of them as fast as they are made.
As an add-on attachment to a firearm, there is no requirement for purchasing through an FFL, and I'm sure the hoplophobes will begin screaming very soon. Get them while they're hot, as they say.