VERY tight gas cylinder

[Chilly]

Gents,

Years ago I purchased a Garand kit, most likely a Dane. Mix of USGI, Breda, Beretta. I think I bought it from AIM Surplus but can't recall for sure. In any case, at $100 I should have bought all they had!

The gas cylinder on this thing looks like new and is so tight to the splines that I never did bother to install it on the old rotten barrel. We got a Criterion barrel from CMP and the gas cylinder seems equally tight. I don't want to force it until I know that the gas cylinder is correct. Don't want to ruin splines on a new barrel with a junk cylinder.

So are there known to be commercial gas cylinders? How would I detect a repro? Would this explain the extra-tight fit to the barrel splines? I think I could probably tap the cylinder on if I beveled the leading edges of the cylinder ID splines. Is there a way to gage the ID of the cylinder splines?

Thanks,
Byron

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