Hi Guys:
I just got done stripping a K-31 stock and handguard and I was looking it over.
I came to an insightful observation which I think is just one more thing that all adds up to why the K-31's have incredible inherent accuracy.
Looking the bare stock over I noticed that, unlike any other mil-spec bolt rifle, the K-31's load bearing recoil lug of the receiver is at the back of the trigger housing, not at the back of the front main screw bulkhead.
Think about it.
All other bolt rifles that I'm aware of, the load bearing recoil lug that transfers the energy of the cartridge discharging through the receiver into the wood stock are at the point of the front main screw lug to stock interface. That energy then is transmitted through the stock to your shoulder. This energy must pass through the weaker portion of the stock where the magazine and trigger cutouts are made in the stock. This results in a flexing and vibration, not to mention that there is 5 inches more of stock that the energy must go through.
The K-31's load bearing lug is at the back of the trigger housing that is a machined integral part of the receiver. Now the energy only has to go from the rear of the receiver through the solid portion of the stock to your shoulder. 5 less inches of stock the energy goes through not to mention it's not being transmitted around the magazine-well and trigger cutout in the stock.
Definitely a plus for accuracy and overall feel of being solid against the shoulder when being fired.
These things don't even utilize steel cross bolt lugs in the stock to prevent cracking the stock.
Absolutely superior designing and engineering.
The whole rifle can be taken apart in the field with a simple straight small screw driver (universal K-31 tool aka Swiss Army knife). The trigger is a work of art unto itself and can be serviced by hand, no tools needed for complete removal and installation.
The rifle itself is an inline design also. Stand a K-31 and any other contemporary mil-spec bolt rifle on their respective butts and look at the angle the K-31 stands in relation to the others.
These Swiss cats were light years ahead of all others
I wonder what it would cost to produce these rifles today.
Probably a lot
Anyway, just wanted to share with y'all
I just got done stripping a K-31 stock and handguard and I was looking it over.
I came to an insightful observation which I think is just one more thing that all adds up to why the K-31's have incredible inherent accuracy.
Looking the bare stock over I noticed that, unlike any other mil-spec bolt rifle, the K-31's load bearing recoil lug of the receiver is at the back of the trigger housing, not at the back of the front main screw bulkhead.

Think about it.

All other bolt rifles that I'm aware of, the load bearing recoil lug that transfers the energy of the cartridge discharging through the receiver into the wood stock are at the point of the front main screw lug to stock interface. That energy then is transmitted through the stock to your shoulder. This energy must pass through the weaker portion of the stock where the magazine and trigger cutouts are made in the stock. This results in a flexing and vibration, not to mention that there is 5 inches more of stock that the energy must go through.
The K-31's load bearing lug is at the back of the trigger housing that is a machined integral part of the receiver. Now the energy only has to go from the rear of the receiver through the solid portion of the stock to your shoulder. 5 less inches of stock the energy goes through not to mention it's not being transmitted around the magazine-well and trigger cutout in the stock.
Definitely a plus for accuracy and overall feel of being solid against the shoulder when being fired.
These things don't even utilize steel cross bolt lugs in the stock to prevent cracking the stock.
Absolutely superior designing and engineering.
The whole rifle can be taken apart in the field with a simple straight small screw driver (universal K-31 tool aka Swiss Army knife). The trigger is a work of art unto itself and can be serviced by hand, no tools needed for complete removal and installation.
The rifle itself is an inline design also. Stand a K-31 and any other contemporary mil-spec bolt rifle on their respective butts and look at the angle the K-31 stands in relation to the others.
These Swiss cats were light years ahead of all others

I wonder what it would cost to produce these rifles today.
Probably a lot
Anyway, just wanted to share with y'all
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