When did they start to gas Weaver K-scopes??

[Laphroaig]

Hey guys, this is my first post, please let me know if I'm at the right place. I couldn't see an optics forum but maybe I didn't look hard enough.

Anyhoo, I'm curious if anyone knows when Weaver started to fill their scopes with nitrogen. The reason I'm asking is that I want to put a K2.5 on a A-4
Springfield for vintage sniper compitition. I saw a set of the old pre-war Redfield rings (split on top only) on gunbroker and bought them before I reallized what was involved in mounting them on a newer scope with the turret in the middle of the scope. Namely you can't put on the rear ring without removing the bell. My scope is an K2.5 60-C1 model, which I put at about 1960 vintage or so.

I attached a picture of the rings on an older K2.5 which probably wasn't gassed so the eyepiece could be removed without letting out the nitrogen. I don't want to screw up my scope if it is gassed. I also have a set of super low Leupold rings which will work just fine, just not look as cool Thanks.

Laphroaig

 

[rust collector]

Any gas that may once have been inside is assuredly outside by now.

I like to use old style weaver mounts and rings on El Paso glass. Cheap and easy, once you get the hang of moving the crosshairs to plumb with the last turn of the ring screws.

 

[madcratebuilder]

Your old K2.5 does not have any inert gas inside. I have a few old scopes I use in mil-surp and period shoots. I use CO2 from one of my welding bottles as a inert gas if I disassemble a scope.

 

[Art Eatman]

Apologies in advance:

"When did they start to gas Weaver K-scopes??"

When hanging was judged cruel and unusual.