Shmoe

I am in the process of building a 9mm PCC. I went with MidwayUSA AR Stoner Upper and Foxtrot Mike Lower. I know it really doesn’t have a kick but I have had my neck fused twice and want the least amount as possible. I’m trying to decide between DPM Recoil System or Shooting Innovations Recoil Reduction System. Any thoughts would be much appreciated.