I must admit I grew a bit suspicious of my VSKA after reading all the comments here and on other websites so I purchased a set of GO-NO GO gauges. All is well. Marching on....
For sale is custom AR10 based on a Noreen Billet 308 Upper and Lower Receiver with the following parts spec:
20” Custom McGowan Heavy Barrel chambered in .308 Win, 1:10 with .936 gas block diameter
Magpul PRS GEN3 Precision-Adjustable Stock - Black
Hogue AR-15 OverMolded Pistol Grip - Black...
Not a PCP but my Weihrauch HW77 fits the bill nicely. It's not very high powered at around 12ft lbs, but it's one stroke and you're good to go. Varmints beware.