Threaded my first barrel

[gregmanz]

Threaded my first barrel today, it is for a uzi micro pro. Checked concentricity of the bore
To the OD, turned, threaded. Final results were under .001 of run out. Now to do a 15-22 barrel

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[lwshack]

Looks good, in to see the 15-22 barrel

 

[Molon Labe]

Looks good to me


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[gregmanz]

Looks good, in to see the 15-22 barrel

Waiting on the dumb barrel nut removal tool, didn’t see that coming


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[57fairlane]

Looks great!

I've got the most accurate prints I know of for an UZI barrel if you decide to make your own.

There's like 3 different ones floating out there on the internet so I assimilated those, the guy I was working for at the time somehow managed to find some heavily redacted IMI print in hebrew, and we had a class 3 dealer come by to test fire the first run of barrels.

 

[BIKER13]

very nice

 

[gregmanz]

Looks great!

I've got the most accurate prints I know of for an UZI barrel if you decide to make your own.

There's like 3 different ones floating out there on the internet so I assimilated those, the guy I was working for at the time somehow managed to find some heavily redacted IMI print in hebrew, and we had a class 3 dealer come by to test fire the first run of barrels.

That would be awesome but making a gun barrel is far outside of my ability I think. No blue how to do rifling. I wish I could. I’d really like to try a uzi parts kit.


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[gregmanz]

very nice

Thank you


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[SOLGardener]

IMO, the muzzle device looks like it indexes off of the shoulder. You should clean that shoulder and cut it to 90 degrees with a relief to the minor thread dimension from the last rear thread to the shoulder. The cut at the shoulder should be filleted to avoid a stress point.

 

[Willhangfire]

That would be awesome but making a gun barrel is far outside of my ability I think. No blue how to do rifling. I wish I could. I’d really like to try a uzi parts kit.


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Very accurate rifled Barrels were made in the late 18th century. After the bore was drilled out on some version of a metal-working lathe and reamed to size a cam bar machine was used to cut the rifling. It amounted to a machine that resembled a lathe with a set of ways with a rack and pinion gear arrangement. The rack was attached to a bar with a bushing and the bar could be set to an angle. A rod with a cutting tool the width of the groves (much like modern barrel cutting machines) was mounted to the pinion gear and as the rack and pinion gear were pulled along on a saddle the rack would follow the angled bar causing the pinion gear with the cutting tool to rotate, producing the twist. The rate of twist could be easily regulated by changing the angle of the bar. More angle, faster twist and visa versa. After one grove was cut the tool bar would be indexed to cut another and so on. Very effective machining process! I've been doing precision machining for over 40 years and never got around to trying it...yet!