Ive always wanted a SP89. I love the look and feel of it. I shot a MP5k in full auto when I was a teen. My dads buddy had 1. I can't justify a HK SP89 at $4000.00 so I got the next best thing. Cohaire Arms is making these with HK parts and after market parts on their receiver. I am very happy so far I will fire it this weekend. I added a B&T mount and a Aimpoint Micro T-1. The Micro T-1 does co witness the sights.