New to PCP, new R10

I've had several RWS springers over the years, just bought my first PCP, a brand new BSA R10 SE...This thing is a ball to shoot. Had a very small crack in the stock just under the bottle, but it's small enough that I can live with it. Can only shoot 40 yards out back, but its still fun finding pellets fused together. Had bought a Donniefl Koi in anticipation of a BSA Buccaneer I was looking at before the R10, so I put it on, as it seemed quieter than the stock suppressor. In order to use the barrel shroud with the Donniefl, I stretched and slipped a 3/4" rubber grommet over the barrel, which fit and centered the shroud perfectly, just had to snip one side of the grommet with nail clippers.

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