Mk1 butstock on a Mk11 lower

[smlemk111]

I was wondering if a Mk1 butstock will fit on a Mk11 lower? Thanks Alan Abramson

Information

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[Brit plumber]

Yes it will, they are interchangable.

[Kev G]

When fitting you will just need to replace the MK2 return spring tube nut with a MKI return spring tube cap and nut.

ATB Kevin

[Peter Laidler]

Directly interchangeable............ Thinking out aloud, I don't recall so. I think that you have to adjust the kidney shaped protrusions/anti rotation blocks at the front of the butt so that they fit in to the smaller(?) shaped holes in the butt slide. Nothing major of course but........ It might be applicable one way but not the other. But this was mentioned in the old Bren EMER's/Notes for Armourers for the information of those who still have Bren guns in their charges. It suggested that the butt was fitted over the return spring tube and tapped with a rawhide mallet so as to slightly mark out the differences between the kidney shaped slots. Then make off to suit, then fit.

Make sure that when you do fit a new butt that its the front end of the butt INSIDE the housing that takes the weight of recoil and not the edges around the outside of the housing. If not, the edges will split and you'll have to patch it

But once you have overcome the actual fitting to the butt slide, then the butts as an assembly are interchangeable. Not something we'd do in service because after the late 70's the older butts were obsolescent and NLA (no longer available or NP (not provisioned) in the VAOS lists. The only butts available thereafter were the lightweight Mk3 gun type. That's why you will often see old UK spec Mk1 and 2 Brens and DP L54's with the Mk4 lightweight butts. Strangely, the curved Mk1 carrying handles were available right up to the end of its life. They were all marked JI, presumably Canada supplied a zillion years worth of spares.

[Brit plumber]

Directly interchangeable............ Thinking out aloud, I don't recall so. I think that you have to adjust the kidney shaped protrusions/anti rotation blocks at the front of the butt so that they fit in to the smaller(?) shaped holes in the butt slide. Nothing major of course but........ It might be applicable one way but not the other.

Intrestingly, I've found that some Mk2 slides have the large kidney shaped hole that will accept the Mk1 stock and then some where the top kidney is slightly narrow. I'll have to have a look and see if its applicable to Inglis or Daimler/monotype guns.

[Peter Laidler]

I recall that there is something different as it mentions that Armourers should be aware of the shape and size of the kidney shaped slots and corresponding recesses. Keep us all up to date BP

(added a bit later............) Is everyone aware that there is a later variant of the butt plate for the Mk4 butt with a loop attached/welded to the top so that the gun could be carried with the sling fixet to the top of the butt - as opposed to the side as in the usual butt plate.

This was because the sling hooks were causing havoc to the right hand side of the butts where it hooked into the Mk4 butt butt plate. Maybe photo maestro KG could put a picture up

[tankhunter]

(added a bit later............) Is everyone aware that there is a later variant of the butt plate for the Mk4 butt with a loop attached/welded to the top so that the gun could be carried with the sling fixet to the top of the butt - as opposed to the side as in the usual butt plate.

This was because the sling hooks were causing havoc to the right hand side of the butts where it hooked into the Mk4 butt butt plate. Maybe photo maestro KG could put a picture up[/QUOTE]

Peter, wasnt' this a Mod, or miscelaneous instruction in E.M.E.R.s?

[Peter Laidler]

You're right Tankie, it was one or the other. But another slight variation none the less, that some Bren fiends won't be aware of.

[Kev G]

L4A9 with bonus of sling loop to top of butt plate -



ATB Kevin

[tankhunter]

All a bit invloved & superflous when you think about it Peter. IF the gunner simply fitted a sling through the loop of the Buttplate without using the hook. instead of snapping a hook on there as well (I realise the sling is issued with TWO hooks) it would have made modding the buttplate with the top hoop unessacary & added the bonus of being a little more tactical in that there would be less metal clicking & clunking when being carried on a patrol! When you look at a buttplate sling loop on a MKIV Plate, it certainly is wide enough to fit a sling THROUGH it & NOT use a hook. Ill bet a pound to a pinch of 'Brown Stuff'. that was what was ORIGINALY intended to be effected! And from a QM's point of view, only HALF of the amount of sling hook assemblies need ever be used & the money saved in not having to order double that amount originaly!