The rifle you have looks to be a PH6SE the standard PH6 has a different style stock in beech, also it has a barrel band on the front of the cylinder the silencer fits on the barrel and overhangs the cylinder. The SE cylinders were satin silver with the bolt housing and muzzel brake/silencers in satin black. I think that the SE stock was designed for Daystate by Garry Cane and were often made from some nice grained walnut , a very nice looking rifle i have one myself.
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