Ask ko lang mga bro, where can i find a 170mm para tube? My frame for my open project gun is para compatible only. I tried to look at different gun stores but what i got is only a 20-rounder Para .38s at Final Option at MCS. Medyo lugi yata compared to SPS open mags which is 27-rounder. BTw, yan na lang kc kulang kong part, and optics of couse. Any advise please...Thanks!!!