Hi Russ,
The U.Mikes QDs which I have installed on my HW90 came with shims which could be used in case the swivel was a loose fit on the barrel.Your friend should have tried any plastic shim b4 using loctite!!!!....Unable to understand why he fitted the swivel so close to the breech end(unless he was trying to mimic a FWB 124)....where were you when he need u most <img src="http://jsramsbottom.co.uk/bbs/e/icon_rolleyes.gif" alt="Roll Eyes" width="15" height="15"><!--graemlin:-->.... <img src="http://jsramsbottom.co.uk/bbs/e/icon_biggrin.gif" alt="Big Grin" width="15" height="15"><!--graemlin:-->.
Anyway if the loctite does leave a mark,use a blueing pen to touchup the area.....
.....Clary