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L111A1 Grenade Nomenclature

paul the grenade

Well-Known Member
HI all.
Can anyone tell me why the right hand L111 A1 has a B1 in the nomenclature? I cant find any difference in the two grens.:tinysmile_cry_t2:
Cheers, Paul.
 

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Paul,
the "B 1" marking denotes a modification of some kind, either in design or manufacture or materials used, in this case it could be something like the make up of the rubber etc, not really sure. I have it on some baton rounds too, in which case I think it was different type of rubber/plastic composition used. Hope this helps, Tony.
 
If I remember my first lessons, the marking B1 denotes a first (1) structure modification (b), also roller63 said. It's a difference only of material. The functioning of the munition stay the same in all points.

Yoda
 
Since the lot numbers are identical I wonder if the one got the "B1" rubbed off.
 
the "B 1" marking denotes a modification of some kind, either in design or manufacture or materials used, in this case it could be something like the make up of the rubber etc, not really sure. I have it on some baton rounds too, in which case I think it was different type of rubber/plastic composition used. Hope this helps, Tony.

roller63,
the 1995 edition of Infantry Training Volume III Skill At Arms (Section and Platoon Weapons) Pamphlet 13 Grenades and Associated Weapons, says that the L5A4B1 is to be fired from the L104A1 only, and the L5A4B2 is to be fired from the L67 only, but does not explain why.
 
A1 - B1 Variant

Hi I was going to ask the same thing about the B1 ,
I just got one it was a bit dearer to buy than the A1 , I have been looking for something to catch my eye ??

Cheers Ken
 

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It is a minor change to the 'firing piece' which carries the firing pin. The upturned end of the firing piece is made slightly longer so that the holes in the fly-off lever do not align with the holes in the fuze body when in the fired state. Basically it prevents the safety pin being inserted until the firing piece is 're-cocked'; once re-cocked the lever seats correctly and the safety pin can be reinserted.

Hope that helps. Try it.
 
Hi thank you for that , I have 3 x L1 series of practice.
I have one with no Stencils and a leather spoon retainer,
I have taken pictures of the strikers the B1 has a longer one than the A1,
But the one with the leather and no Stencils has the same striker than my B1
Is it possible the L1 with the leather retainer is a B1 also

Thanks Ken ,
 

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Ken,

I don't know the answer but it has been my experience that modern British ammunition complies to a specification and, where there is a need to depart from the initial spec, another is written to accommodate the change and feed the various agencies that need to account for the change in their areas of responsibility (eg Technical Regs, procurement, training etc.). So, in my opinion, and in the absence of a manufacturing concession, if the unmarked grenade has an unusual component (leather retainer for instance) that component is unlikely to be a British Service item. It could be a trial item or something 'crossed over' from a another country (numerous countries took up the SM HG85 series) by a collector or dealer.

Despite the fastidiousness of the UK procurement authorities it doesn't always go to plan. Look at the marking on the Drill version of this grenade as an example.

Sorry this is a long-winded way of saying I don't know.

Best
 
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