Franklin arms binary trigger pack for HK firearms. I briefly used it in a SP5K but can be used SP5 and other formats similar like the 91 and 93. Will need to install into your trigger housing. It's not difficult to do. $500


also have an HK brand 3 or position stock for SP5 or MP5 $500

a clipped and pinned HK 3 way trigger housing  text for photos  also have a trigger group for if interested or you could put a binary trigger in it  or it can be used a semi auto two trigger as well  $600 for housing or $1100 for housing and trigger group

contact me armslist or text 8six5-3one8-nine6nine3

 

texy is best before calling so I know it's not a robocall