R.H. When I had that PolyChoke put on I thought I would like it.It was a big disappointment to say the least.I still have that barrel but it hasn't been on my 870 in years.I would imagine I had it installed in the mid 70's.Our Gunsmith wasa authorizedPoly Choke service center. Not sure if that's what I'm trying to say.He was listed as a dealerfor installing Poly Chokes.I didn't like that big thing hanging on the end of my barrel.Seems to me at that time it was 50-60 bucks for that gizmo.A waste of good money no doubt.

Ruger Redhawk