For 2013, Blackhawk! is introducing the GripBreak line of holsters that use a mechanical retention device to secure the pistol.  The retention mechanism is thumb release lever that is deactivated when the shooter obtains a proper grip on the handgun to draw.

The GripBreak line is completely different from the SERPA line, and is not intended to replace the SERPA line according to a Blackhawk representative I spoke with.

The GripBreak holsters are currently available in leather and nylon styles for concealed carry.  The leather holsters use premium, drum dyed Italian leather with an internal molded shell.  They are currently being made to fit Glock, M&P 9/40 and 1911 pistols in both right and left handed versions.  MSRP is $76.99.

The nylon holsters are being made in right and left handed versions for the same pistols.  MSRP is $39.99.