High end lockback folder (around 4 inches) recommendations

[AfterDark]

I want something similar to the chinook with a strong sturdy lockback. Production or custom is fine, any recommendatinos?

 

[neuron]

Andrew Demko custom AD-10 if you can get your hands on one.

 

[Vanguard41xx]

Spyderco Persian?

 

[stormyone]

Police 3 G10 spyderco