[cyclopsshooter]

Can anyone recommend a good smith to cut a 5" 1911 barrel for a Commander and thread it? Fair price and good turn-around-

Thanks,
Cyclops

[1911Tuner]

It'd be better to just order a Commander barrel if you want that length.

If you want the end of a 5-inch barrel threaded, the threads will have to be super-fine. Otherwise, you'll cut the barrel off before the threads are fully formed. Even with fine threads, you'll cut so far into the barrel walls that it'll probably separate with little use.

[wally]

0.578x28 is the "standard" thread for .45ACP suppressors, 5/8x24 is the largest piston Silencerco offers for their Ospry 45 suppressor.

[1911Tuner]

A 1:28 pitch? That's .031 inch thread depth.

Forsooth! That's half the thickness of the barrel wall if they cut a sharp V thread.

If they use American Standard Form, at 75% thread, it's still .025 inch deep.

[cyclopsshooter]

Ouch. So much for saving a buck or 200.. :rolleyes: So I gather that a properly threaded 1911 .45 barrel has threads greater than the OD of the barrel? Necessitating a non removable barrel bushing?

[1911Tuner]

I don't keep up with suppressed 1911s, and don't have a clue what's out there for that application. It would seem to me that a .030-.040 barrel wall with multiple stress risers would be a bit...fragile.

I do remember a bushing with a threaded extension that worked very well, but haven't seen one in many years. If they're not available any more, the best route would probably be a bushingless bull barrel.

Also...any can that becomes part of the reciprocating assembly that's also large enough to be effective in dampening the sound make it too massive to operate as a semi-auto, making it necessary to operate the slide manually for successive shots.

[Greg528iT]

I've wondered about this barrel
http://www.midwayusa.com/product/983794/swenson-semi-drop-in-barrel-1911-government-45-acp-1-in-16-twist-575-government-threaded-578-28-thread-steel-matte-black

Kind of took the price to be, to good to be true.

On the NFA page there are a few guys running suppressors on 45 ACP. The data I've found show a few manufactures reducing the noise to about 120 db ish. While still loud, it's still way better than unsuppressed 135/140 db. Of course they have to run a spring assembly in the suppressor to allow for proper cycling.

Cyclops, it might be worth $55 just to try it??????? maybe.. It'd stick WAY out on your commander though. and.. is the barrel going to be the correct OD, .75" short of the normal bushing mating surface?

[cyclopsshooter]

Says the Midway barrel has a "National Match" ramp.. Never heard of that before.

[Pietro Beretta]

These guys thread barrels, not sure of your location but these guys are great.

http://www.tornado-technologies.com/

[dprice3844444]

be cheaper to buy the midway barrel

[wally]

The best suppressors have a "Nielsen" device -- a piston that traps gases and kicks the barrel backward to give a "normal" net recoil impulse to the action. Muzzle flip is still greatly reduced because of the mass of the suppressor hanging off the front.

They work great -- no spring changes on my Glock 17L or FNP-45, although I've not got a threaded barrel for any of my 1911s yet.

Silencerco also has 16x1 metric pistons which is about 0.63" slightly bit bigger than the 5/8" I mentioned initially. I think this is what my FNP-45 uses.