So from the Tidal Update 10 Patch Notes:
The Backpack is currently not applying the "No longer reduces number of stacks lost on missed shots" aspect of the talent, nor is it listed on the live server:Striker’s Battlegear
Main Talent
Reduced the number of stacks lost on missed shots from 3 to 2
Backpack Talent
No longer reduces number of stacks lost on missed shots
(New) Increases total weapon damage gained per stack of Striker's Gamble from 0.5% to 0.65%.
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