$20
But next time I'm ordering directly from the guy who installed them.
I paid $80 for the tfo so $100 afyer install.
He said $70 if I order from him and he installs for free.
How true is this......I've consistently shot to the left since April with my 17.
Same for my 19 & 23.
I'm very relaxed when shooting and control breathing fine.
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