I'm thinning out the rack a little and no longer use these. 

They all work well and still have plenty of climbing left to do.

Sling dates:
.4 (both 2014)
.3 (2014 and 2018) (the 2018 squeaks a little when pulling the trigger, but works just fine)
.2 (2014 and 2017)

$45 each or $250 shipped to you if you take all 6. Located in New Mexico.