Threading a 303 Brit barrel

I once priced out the CNC warrior style with a pilot, cutter and die, by the time I had it shipped to my door it was comparable to the price of paying a professional on a lathe.

It’s a neat idea, not sure it’s a good idea though.
 
Can't be done? A split die for a 5/8" or 1/2" thread? The problem would be getting the thread axis co - axial with the bore axis, and the quality of the threads. The barrel is already as short as it can be. Therefore no do overs.

Get someone to turn a hollow bushing to match the exterior taper and with a stepoed hole? Get them to start threads on it.
You'd need to affix the bushing to the muzzle somehow (flank pins) like the way the rear sight base is held onto the #1MkIII? Still, you are running into $$$ but you don't need to ship your action anywhere.

Like the poor dude in 'Falling Down' the job is 'not economically viable.'
 
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fat tony said:
The barrel is already as short as it can be.
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Would people please stop saying this? The barrel is 18.5" long, which is the limit for a centerfire semi to remain non-restricted (actually the limit is 470mm). Since the Enfield is a manual action the barrel can be cut to 457mm (17.99") and still remain non-restricted.

In this case that extra 1/2" doesn't offer enough to take a second try if OP screws up the threading the first time, but lets not be spreading BS about the actual legal barrel length limits.


Mark
 
fat tony said:
Get someone to turn a hollow bushing to match the exterior taper and with a stepoed hole? Get them to start threads on it.
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It'd be simpler to just use all the same tooling and just directly thread the barrel. Anyone who can do the stuff you talk about, can also just thread the barrel.
 
I Dont Care About You said:
It'd be simpler to just use all the same tooling and just directly thread the barrel. Anyone who can do the stuff you talk about, can also just thread the barrel.
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Think #5 Mk I rifle. Modularity, second chances, less irreversible committment.

Industry solution:

wittmachine.net

I get it, the smle barrel is tapered and so forth. Modification: additional set screw or flank pin. They could make an adapter with a flank hole already drilled. All he'd have to do is carefully file a notch in the barrel until the pin goes through with his hammer and drift.

You could get really ghetto and file the small end of the barrel for a circlip. 😄

The device looks solid enough to drill and tap for a front sight?

Numrich has the real #5MKI unitized flash hider/bayo lug/ front sight bases. They also have ones from when Gibbs went belly up, they have no bayo lug and a two slot compensator. Kinda ugh.

The diameter at 18.5"? you'd have to get one to check the measurements etc.
 
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fat tony said:
Think #5 Mk I rifle. Modularity, second chances, less irreversible committment.

Industry solution:

wittmachine.net

I get it, the smle barrel is tapered and so forth. Modification: additional set screw or flank pin. They could make an adapter with a flank hole already drilled. All he'd have to do is carefully file a notch in the barrel until the pin goes through with his hammer and drift.

You could get really ghetto and file the small end of the barrel for a circlip. 😄

The device looks solid enough to drill and tap for a front sight?

Numrich has the real #5MKI unitized flash hider/bayo lug/ front sight bases. They also have ones from when Gibbs went belly up, they have no bayo lug and a two slot compensator. Kinda ugh.

The diameter at 18.5"? you'd have to get one to check the measurements etc.
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Just took a look at numrich, the end of my barrel was turned down to fit the original fsb but didn’t have the slot cut for the locking lug,(idk the actual name for it but it stops the sight from moving side to side) instead they filed a slot in for the pin, didn’t work great lol, I might get one of those #5mk1 fsb with the ports and cut off the cone thus creating the look I’m after but not altering any historic parts, thanks for the info
 
fat tony said:
The hole on the #5MKI fsb might be too big. Maybe a senior member here could check the bore dimensions of one for you.
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Depends on what one? As there were ones to convert cut down No4 to No5 clones. Then the actual No5.

The one I had was .660" ID. Required 1.675" of turned down barrel.
 
Properly installing a No. 5 muzzle unit would require as much or more effort than properly installing a brake.
 
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