Rear sight replacement for No1MkIII

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   Gents, 	I will be changing the rear sight on my No1 MkIII*. I wanted to check if there is anything difficult to watch out for when doing the job? It's just the graduated part not the piece around the barrel. I assume it's just knock out the small pin and drift out the pivot. Should I replace the pivot as well?I have found that the original one has sideways movement at the rear of about 16 thou (0,4mm) and also the slide jumps up with recoil. The replacement appears to be unused. 
Thanks in advance, Zed.

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Zed Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: May 01 2012 Location: France Status: Offline Points: 6460	Post Options Post Reply Quote Zed Report Post Thanks(0) Quote Reply Topic: Rear sight replacement for No1MkIII Posted: September 16 2014 at 3:38am
	Gents, I will be changing the rear sight on my No1 MkIII*. I wanted to check if there is anything difficult to watch out for when doing the job? It's just the graduated part not the piece around the barrel. I assume it's just knock out the small pin and drift out the pivot. Should I replace the pivot as well? I have found that the original one has sideways movement at the rear of about 16 thou (0,4mm) and also the slide jumps up with recoil. The replacement appears to be unused. Thanks in advance, Zed.
	It's nice to be important, but it's more important to be nice!

White Rhino Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: May 05 2006 Location: United States Status: Offline Points: 5153	Post Options Post Reply Quote White Rhino Report Post Thanks(0) Quote Reply Posted: September 16 2014 at 3:55am
	Yea, replace the pivot/pin also ..if its moving it must be worn..... maybe replace the pin and see if that will correct it , unless you already have everything ...
	"White Rhino" "Everybody's got to believe in something. I believe I'll have another beer." --W. C. Fields

Bear43 Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: August 11 2010 Location: Doland, SD Status: Offline Points: 3500	Post Options Post Reply Quote Bear43 Report Post Thanks(0) Quote Reply Posted: September 16 2014 at 3:57am
	Once you remove that pin the rear sight leaf will just pop right out of the base. I recommend using a clamp to hold it against the spring until the pin is out as well as using the clamp to push down the sight leaf against the spring so you can put the pin back in. It makes it a lot easier! Also, with the old slide, once you get the old sight leaf out and remove the slide just tear it apart and replace the springs. It will give you a spare slider that way.

Zed Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: May 01 2012 Location: France Status: Offline Points: 6460	Post Options Post Reply Quote Zed Report Post Thanks(0) Quote Reply Posted: September 16 2014 at 4:51am
	Thanks, I'll clamp it to hold the spring. I have the new sight leaf but will need to change the spring in the original slide and re-use it. I'll measure the pivot and get one if it looks knackered.
	It's nice to be important, but it's more important to be nice!

Shamu Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Logo Designer / Donating Member Joined: April 25 2007 Location: MD, USA. Status: Offline Points: 20510	Post Options Post Reply Quote Shamu Report Post Thanks(0) Quote Reply Posted: September 16 2014 at 5:46am
	Can you use a slave pin while doing this? Even a paperclip might help with reassembly.
	Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)

Zed Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: May 01 2012 Location: France Status: Offline Points: 6460	Post Options Post Reply Quote Zed Report Post Thanks(0) Quote Reply Posted: October 05 2014 at 11:26am
	I've changed the rear site blade and stripped the slide and fitted a new spring that I got from a starter button that had been in my tool box for years,(possibly from an old Jag) spot on diameter and just needed shortening one coil to make it work. It's stiffer than the original and has made a noticeable difference. I had bought one but it was rusty and no better than the original. No sideways play at all on the blade now and the slide stays put on recoil. The rifle always shot left of aim point and the front blade was already left of centre. With the new rear sight it was shooting 1" right of centre, so I can bring the front blade back to the centre. The groups are getting better too, with the test loads getting close to were I need to be. Best group on saturday was 4 holes within 0,75" square with the 5th one at 0,5" above. (at 50 Metres)
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Canuck Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: January 17 2012 Location: Cochrane, AB Status: Offline Points: 4021	Post Options Post Reply Quote Canuck Report Post Thanks(0) Quote Reply Posted: October 05 2014 at 12:15pm
	That's great, Zed! Nice fix and glad your POI is getting closer to where you want it.
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Bear43 Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: August 11 2010 Location: Doland, SD Status: Offline Points: 3500	Post Options Post Reply Quote Bear43 Report Post Thanks(0) Quote Reply Posted: October 06 2014 at 6:52pm
	Great job on finding a workable spring. That is an annoying experience when that slide won't stay put. I went through that a few years ago with a rifle. Took a bit to figure out why the rounds were climbing the target.