Garand NM Gas Cylinders

[StockDoc]

Is there anything special about these Gas Cylinders that warrant there high price. Were they hand finished?

[Johnny P]

From what I have read the rear ring was reamed out to prevent contact with the barrel.

[StockDoc]

From what I have read the rear ring was reamed out to prevent contact with the barrel.

I've heard that, and the rear lug was clearance to avoid contact with the front handguard. That was all I could find. But the seem to be selling for $300 and NOS ones are going for $120-200

[Orlando]

I've heard that, and the rear lug was clearance to avoid contact with the front handguard. That was all I could find. But the seem to be selling for $300 and NOS ones are going for $120-200

Barrel ring is enlarged and on some the lug was beveled not to contact the hand guard
They are expensive becuae of supply and demand.
I have several originals , you can easily modify a cylinder to NM specs yourself

[StockDoc]

Barrel ring is enlarged and on some the lug was beveled not to contact the hand guard
They are expensive becuae of supply and demand.
I have several originals , you can easily modify a cylinder to NM specs yourself

Thanks for the info

[musketshooter]

The NRA pamphlet on accurizing the M1 shows how to remodel the gas cyl into a national match type. If you buy one at some exorbitant price, you may be buying a bubba job sold as a Springfield original. Properly done, you will not be able to tell the difference.

[Ted Brown]

The M1NM gas cylinder 1005-649-9269 was produced in 1962. New in the can cylinders do not have the rear tab narrowed. That was done when installed. The rear ring is larger than standard, .6440-.0002". Some armorers feel that it is necessary to insure there is contact at the bottom of the rear ring with the barrel. I haven't found that there was any difference in accuracy when done to this spec. The NM gas cylinder is the same as standard in all other areas. They are hard to find and therefor cost more. Standard gas cylinders can be modified to the NM specs with little trouble.

[StockDoc]

then they could be easily faked.

Thanks for the replies

[Orlando]

then they could be easily faked.

Thanks for the replies

If you had a NM stamp they could



Originally they also had a DOD Ink stamp but are usually worn off

[StockDoc]

I always thought that the "NM" was done with a single stamp. But it looks as though many were don with separate letter stamps. Some that I have seen had varying space between the letters and some one or both the letters are canted

[JimF]

......Some armorers feel that it is necessary to insure there is contact at the bottom of the rear ring with the barrel. I haven't found that there was any difference in accuracy when done to this spec. . . . . .

Way back when, I accurized my "once-in-a-lifetime" DCM M1 according to a Navy armorer who DID mandate contact with the barrel at six o'clock.

Before I complied with this spec., I fired for accuracy with the cylinder "as issued" then again after the "bearing at six o'clock" spec. of the Navy.

There WAS a small difference (improved) in accuracy . . . but accurizing an issue M1 is an "accumulated" effort utilizing MANY small tolerance-tightening proceedures throughout the rifle.

Probably the most important aspect of accurizing is the very tight fit of the barreled-action in the stock! --Jim

[StockDoc]

. Some armorers feel that it is necessary to insure there is contact at the bottom of the rear ring with the barrel. I haven't found that there was any difference in accuracy when done to this spec. .

So they are not reamed but relived. Are the splines any different so as to get a tighter fit on the barrel?

[Orlando]

Splines are not different. A NM gas cylinder was built from a standard gas cylinder, no difference besides the modifications

[StockDoc]

[QUOTE=Orlando;445135]Splines are not different. A NM gas cylinder was built from a standard gas cylinder, no difference besides the modifications[/QUOTE


Thanks

[2111]

If you had a NM stamp they could



Originally they also had a DOD Ink stamp but are usually worn off

I am not to sure about " Originally they also had a DOD Ink stamp but are usually worn off" ' My thought is that if the NM gas cylinder was manufactured at SA and installed during NM build at SA then the Gas Cylinder would not have a DAS on the bayonet lug. If the gas Cylinder was a contracted part it would be stamped at acceptance. I doubt even all of the contracted gas cylinders would be stamped, maybe 1 out of 100 or something like that. I have no proof of this, just speculation on my part.