LONG BRANCH TRIALS RIFLE LIGHTWEIGHT BARRELED ACTION.....PICTURES

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Here is a very rare experimental barreled LB No4 lightweight action. Not sure how many were actually made but I've heard maybe 15-20. This appears to be the "9th" one produced. These were made in 1943 to compete with other submissions with the end result being the adoption of the British designed No5 Jungle Carbine.
Historical accounts say that the one piece stock design was not strong enough to endure battlefield conditions and was prone to breakage which ultimately led to its disqualification in trials. The stock had significant lightening cuts to reduce weight which weakened it!

One can see the difference of the innards of the receiver compared to a standard No4 and what was done to help reduce weight.
An interesting note, one can see that LB had engineered the hung trigger long before the Brits came out with the MK2!

In the "unlikely" event anyone ever run into parts, I would appreciate a heads up! Not expecting to find anything but extremely rare stuff can show up in the strangest of places.

Rear peep has been cut off and a "sight" groove filed in; this rear sight is easily replaced. The parts I really need are a stock and trigger guard and a front sight assembly, although the ears that were cut could be rebuilt.

It seems "Bubba" didn't like the foresight ears and the rear peep on the newly acquired "hunting rifle" and set about to do some personal modifications! I have a suspicion that the stock broke on a hunting trip and may have even ended up in the trash or wood stove, the trigger guard at that point was no longer attached to the rifle so more than likely it bore the same fate as the stock.

I know of a fellow with a complete rifle but understandably he is very reluctant to take it apart so a proper drawing can be made of the stock and trigger guard to start the process of a restoration. I don't blame him one bit as these in original condition are so valuable and extremely rare that one wouldn't risk the potential of losing or damaging any parts!

Anyhow enjoy the pictures. If you like odd Enfield's and you've never seen the inside of one of these actions it's neat to see the changes from the standard No4.
 

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Well, That's unexpected.

I read about these years ago.

There was another member that posted about theirs, also sportered, back in 2012. Found the thread after reading this one and googling to see what these should look like.

https://www.canadiangunnutz.com/forum/threads/longbranch-4-lightweight-trials-rifle.815878/

His is missing the sight ears as well, but he does have a trigger guard and what looks like a custom stock. Not sure if the guys still active but could be worth a message if he still has it. could help in re creating some of the missing parts.

The trigger guard look like a standard one could be modified to work maybe? Wont be the aluminum alloy but would be hardly noticeable and an understandable deviation from original.

The front sight might be the hardest part. How does it even fit on there? The normal one would fit over the bayonet lugs but the one on there look like its right sight to to the barrel.

Best of luck with the restoration.

Wonder how many more of these are there left? My longbranch collection would need one but probably not gonna find one. Even sported these are worth it to have in a collection.

And for those also wondering.


tumblr_ojn49lvjw31s57vgxo2_1280.jpg
 
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I have one of these that was built as a sporter by SAL, created a thread on it several years ago on gunboards.
https://www.gunboards.com/threads/l...orter.1229392/?post_id=11136311#post-11136311

I also collect pictures of the different examples as I come across them, so far I have pictures of #'s 12, 13, 16, 17, 28, 33 and several that were not serialized.

A talented stock maker could likely reproduce the stock. The front sight is a bit tricky, might be able to fit the removable sight ears off a C1A1 on there with a bit of machining. Either that or find yourself someone who can reproduce the original.

Original
image018.jpg

C1A1
C1A1.JPG
 
Thanks fellows for your replies.

I'm having a busy day here and I'll check out the links in greater detail later.......I never knew that there were reportedly 50 made but for sure we know #28 exists as seen in the thread supplied by LeeEnfieldNo4mk1 and also #33 as polkey owns.

I have no doubt a stock could be made but to acquire the proper drawing is the problem if one wants an exact authentic reproduction. I'm not giving up hope though.

More later.........
 
If your Not opposed to modern solutions,

If you can find someone with an original stock and front sight, is maybe try using 3d scanning to create a 3d image. you can then use a CNC Router to produce 90 percent of a new stock. In letting might have be be mostly done by hand but external contours could be matched mostly. Might be harder for the front sight base however. I know model companies have been using 3d scanning to create very accurate models.

Takes a little knowledge in CAD programs and either deep pockets or connections for the gear, but could be a way to get a very accurate reproduction. Also, if you would be inclined, you could post the files so other with sporterized rifles could make replacements, or for people wanting to make a repro.

Another thought is that rear sight is not write off. Could make a perfect candidate for either a replacement for Longbranch N0.4 Sniper, or someone doing a replica Faux T, since the aperture is milled off on those regardless.
 
If your Not opposed to modern solutions,

If you can find someone with an original stock and front sight, is maybe try using 3d scanning to create a 3d image. you can then use a CNC Router to produce 90 percent of a new stock. In letting might have be be mostly done by hand but external contours could be matched mostly. Might be harder for the front sight base however. I know model companies have been using 3d scanning to create very accurate models.

Takes a little knowledge in CAD programs and either deep pockets or connections for the gear, but could be a way to get a very accurate reproduction. Also, if you would be inclined, you could post the files so other with sporterized rifles could make replacements, or for people wanting to make a repro.

Another thought is that rear sight is not write off. Could make a perfect candidate for either a replacement for Longbranch N0.4 Sniper, or someone doing a replica Faux T, since the aperture is milled off on those regardless.
Good advice about the scan and the CAD programs. I know just the guy who could give me advice on that. He is a "boots on the ground" solutions guy for Master Cam, he will no doubt have some good advice and steer me in the right direction. I'm sure at the same time they could scan the front sight with the protective ears.
 
I'd like to see better detail pics of how the trigger works.
PXL_20251226_185816868.jpg

Well hope these pictures help to answer your questions about how the trigger works.

The long trigger forms into somewhat of a block when it enters the sear block housing and is secured in place by a drift pin, it of course pivots on that. The forward part of the sear block housing is also held in place by the "middle" of the 3 pins and it pivots on that pin. On the bottom of trigger block there are caming bumps, one to initiate the two stage pull and the rearward one to allow full disconnect from the cocking piece which sends it forward.

The one picture I'm pushing the trigger forward so you can see the sear disengaged from the cocking piece, the others I'm pulling rearward on the trigger.

Hope this helps.
 

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