Not mine but happened to see this for sale.
Is this Wigger's chin gun or just some kind of Fajen?
Still interesting.

https://www.gunbroker.com/item/1077858107

That's a Fajen

Neither of these is a "chin" gun. Lones did not use a chin gun.

That rifle is more than likely a presentation trophy he was given for winning the NRA HP rifle silhouette national in 1976, the last year they held the NRA HP Nationals at the Three Point range in Tucson, AZ.

You are correct Lone Ringer.
Copied from the item description on Gunbroker.

Custom Remington Model 700 .308 Winchester presented to Lones Wigger upon winning the 1976 National High Power Silhouette Championship. Consigned by the fellow competitor as purchased directly from Wigger