Check your Parker Hale target sights, guys!

[Brian the Brit]

I spoke to my gunsmith mate this evening about the loss of adjustment on the windage slider of my PH5C fitted to my No 4 Mk 2 (see the "Random Musings" drivel below).





Phil told me that it is quite common for these sights to fall apart due to the vibration of firing a full military load but that it can easily be prevented.





The adjusting knobs for windage and elevation are each an assembly of two parts, a knurled outer ring (that you turn with your fingers) and an inner boss that fits in the centre of the outer ring. Both these parts are threaded and screw onto the end of the thread that moves the sight up and down and left and right.





The inner boss has two recesses in it to allow it to be tightened against the outer knurled ring to act as a lock nut. The flat underside of the knurled ring has radial grooves that bear against a spring-loaded ball bearing that fits into the body of the sight. As the knob is turned the ball drops into each groove giving the familiar "click" adjustment.





When I was shooting my rifle the vibration must have loosened the inner locking nut allowing the tiny ball to drop from between the body and the base of the knob. Once this happened the sight was useless.





The solution to my problem is to fit another ball robbed from a scrap sight and then to put a drop of Loctite onto the threads before the adjusting knut assembly is tightened onto the sight.





You might care to check your sight to ensure that the two parts of each adjuster are locked tightly together. If in doubt, use a drop of locking fluid on the threads.





Brian

<p></p><i>Edited by: <A HREF=http://pub4.ezboard.com/bmilsurpafterho ... brit>Brian the Brit</A> at: 3/10/04 3:57 pm

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