A friend of mine showed me this for his Tikka bolt. The idea is that it "reduces the pressure on the spring" or such while in storage.

I don't know how effective that is, but I have a 3d printer so I decided to make one. Below is the v1 that needs minor adjustment with the v2 being printed as you read this.

When complete I'll upload the stl for anyone to print. Current bolt is a 10FCP.

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