I joined the SP5k club today! NIB for $2200 with 3rd mag!
Now, I'm looking to start the foundation for an MP5K-N build.
My first question, the rear sight is the castle style. Can I swap out the rear castle sight with this and still have the irons be correct?: https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=72&idcategory=149
any links to the correct rear/ lower price :74: