In reply to the release of the SW500 by MTI, Karpatia released the 3927. Lacking the mass and strength of the Notum alloy frame of the SW500, the 3927 can be just as dangerous to the shooter as to the target. The 3927a was an attempt to repair tendencies of backfiring by adding a wall between the main chamber and the nano-transistor spurs.

In reply to the release of the SW500 by MTI, Karpatia released the 3927. Lacking the mass and strength of the Notum alloy frame of the SW500, the 3927 can be just as dangerous to the shooter as to the target. The 3927a was an attempt to repair tendencies of backfiring by adding a wall between the main chamber and the nano-transistor spurs.