OK back to the OP
Your goona have a hard time finding even body pins for the SIG so if you like 'extras' then your out of luck. But grab the quad rail when you can along with a top rail, should you need it get one of those rail risers to get a red dot sitting where you want. Try to find the cheek rest cuz I'll buy two from you if ya do!
Other than that not really many options, this is no M4
