Mine measures 8.63mm from barrel end to the edge of the hole nearest the end of the barrel. From end of barrel to as near as I can get it to the centre of the hole is around 10.15 mm. Hole is 2.93mm in diameter but it is slightly countersunk so that a bit of a guestimation. Hope that helps, maybe someone else can help to confirm. I measured with my digital calipers. From what I can see just the very tip of the grub screw locates in the hole, the stripper itself is the only part threaded.
Steyr LG110 HFT 2014, Warren Edwards grip set, MTC Viper Connect 3-12x32 SBC
Air Arms TX200 mk3, walnut stock, Delta Optics 4-14 HFT
Last edited by Matt5mith; 28th September 2015 at 07:18 PM.