Kershaw has many assisted opening knives.  Just take a look!

Kershaw Volt SS RJ Martin Assisted Knife 3655

Kershaw Thermite 3880BW Assisted Opening Knife

Kershaw Leek SpeedSafe Assist Knife 1660

Kershaw Ken Onion SpeedSafe Assisted Opening Knife 1660

KERSHAW LEEK 1660OL OLIVE Assist Knife

KERSHAW LEEK 1660OL OLIVE Drab Assist Knife bead blast blade

Kershaw Leek Assisted Knife Silver Serrated 1660ST

Kershaw Knives USA Leek 1660ST Assisted Opening Knife Silver Serrated

Kershaw Leek Assisted Knife Teal Blasted 1660TEAL

Kershaw Leek 1660TEAL Assisted Knife Teal handle Bead Blasted Blade

Kershaw Blur 1675BLKST Tanto Assisted Open

Kershaw Knives Blur 1675BLKST Ken Onion Tanto Assisted Opening

Kershaw Blur Spring Knife 1670BLKST

Kershaw Blur Black Black Blade Spring Assisted Knife 1670BLKST

Kershaw Knives Blur Tanto Green 1670BGTST

Kershaw Blur 1670BGST Ken Onion Tanto Assisted Opening Knife Green