Best flipping action production knife?

[Acesn8s]

I'll submit my ZT 0400 as one fine flipper.The blade just jumps to attention. She's sassy.

 

[heavyfoldersarebest]

Combative Edge M1 and ZT 0600.

 

[FearAgent]

The ZT 0560/0561's action is AMAZING! Better then some of the knives I've paid 5 times as much for

 

[bpeezer]

I'll submit my ZT 0400 as one fine flipper.The blade just jumps to attention. She's sassy.

That one's not manual though