Foresight adjusters

Can the No 5 Mk 1 foresight adjuster also be used to adjust the no 4 Mk 2 foresight.

I don't know for certain, but I would think most likely NOT.

The width of the No 5 rifle flash hider and foresight base is narrower than the foresight protector width on a No 4. If it is a military style cramp which fits on from the front then I do not believe that it would go far enough over the No 4 protector wings to access the holes and get at the foresight blade.

If you are dealing with British military type adjusters ("cramps") be aware that it is the "No 4 cramp" which fits the No 5 rifle, whilst the "No 5 cramp" is made to fit the Sterling SMG.
I found this out the hard way by winning an e-bay auction... have now got the adjuster - problem is getting hold of a Sterling to try it out!

The modern adjusters which are available from US sources on ebay for the No 5 rifle will not work on the No 4; I have one and just tried it. No go at all.

Check out webpage at Fore Sight Adjusting Cramps to see pictures of the various types of cramps.

The short answer regarding the foresight cramp is 'NO'
But if you are using the well tried and tested Armourers method of zeroing hundreds of both both types of rifles during the day, then the answer is 'yes'. Personally speaking, me and zillions of other Armourers learned how to use and memorised the TPI/" @ 25yards of the cramp and practiced it while we were apprentice but once into the big, live REAL world, I, like every other Armourer just used a small 'toffee' hammer and a brass drift. I forgot all about the theory and practice of the foresight cramps and just stuck to the simpler forumla of
FORESIGHT INTO THE ERROR, BACKSIGHT OUT OF THE ERROR. And ALWAYS TREAT A GRATICLE AS A FORESIGHT It never failed

I just happen to have the MK 17 toffee hammer at hand but the drift is copper still if i am very genteel.............thanks again

Carlisle............... Is that Carlisle as in Hadrians Camp Carlisle and Eddie Stobart lorries Don?

While on the subject of place names, the small town I grew up in in Central Queensland had a real property description as being in the parish of Abingdon, part of the county of Carlisle...

Strange co-incidence how these British place names migrated together?

Ah......... that's answered it then. Abingdon here is named after Abingdon in Australia. The strange bit is that when I was in the Army there, because about half of them were nasho's (national servicemen) we had a vast mix from all over the Country and you just got to know where the large and small towns were........... Castlemaine, Bendigo etc etc were all common names but no Abingdon or Shrivenham (where my parents lived). Happy days but soooooo long ago now

Yes indeed it is Peter I have lived here since leaving the RAF in 1975, I was interested to see you mention in your article on EMERS about instrument mechanics / fitters at Carlisle as I was one of these working at 14 MU RAF Carlisle until it closed in 1993 nearest I got to armoury work was testing some stuff off the sidewinder missile and tarting up some old WWII bomb sights for the museum at Hendon.
However last December I got a job at BAD Longtown cataloging all the tooling off the Harriers we sold to the yanks, unfortunately due to defence cuts once the Harrier contract was finished so was I but now enjoying early retirement and looking forward to shooting my latest acquisition No4 Mk 2.

You ought to stick all that old Harrier stuff on Ebay. Someone's bound to need it