Garand NM Gas Cylinders

[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.

[Ted Brown]

None of the NM gas cylinders I've taken out of the can had a DAS stamp. I think this was probably added after the completed rifle was inspected.

[Major Tom]

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

I assume if you peened the splines it would be OK? Just another mod to tighten it up?

[Roadkingtrax]

Perhaps as an in-process visual verification of something having been done and confirmed? Unless someone has pulled NOS NM gas cylinders and saw it already.

I have a 1962 NM rifle, must have been shot once and put away. Joe should remember seeing this one.

[2111]

That's one beautiful rifle and a nice photo Tim. One reason I felt it was a contracted Gas Cylinder is that SA more than likely ran out of new Gas Cylinders before the 1960's. I don't see them using a DAS stamp for anything other than acceptance, but again, I'm just speculating on this. Now that it has my curiosity I will have to look into it.

[Bill E]

Yes, beautiful rifle. Have you shot it? Thanks for posting.