Sporterizing the M1903A4, Austrian Army Style

[Promo]

That rifle on the very right is a prototype to the SSG 98k, the first Austrian post WWII sniper rifle. That features a pre-variant of the SSG 98k mount, which is basically a wingnut that clamps the split bottom ring on a dovetail (with a deciated step in the dovetail as end position and to hold against recoil, basically the same idea that was re-used for the Steyr SSG69). Later scopes have had a split top.