Hinderer screws in a zt 550 & 560 ......help

Joined
Nov 26, 2013
Messages
156
I heard you can put Hinderer screws into a ZT but for what model Hinderer? 3, 3.5, 4? How do you install? I pretty much want as much info on this as i can get. These need that!
IMG_20131114_103419-620x465.jpg
 
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