Sniper training with .22 caliber rifles

Take a look at the muzzle in the first picture. Is he using a .22 conversion kit, or is it just my imagination? The second picture is for comparison.

In sniper training, does anyone know if they used scoped .22 rifles, .22 conversion kits, or possibly both?

It is Just Distortion from Glare . Best Regards

Thanks Dave. That photo makes the bore diameter look tiny and trying to figure it out with the shallow depth of field made my eyes hurt.

In Robert Spielauer’s book, he shows a paper target shot with a .22 that was used during a 1943 sniper training program. Has anyone seen period photos or film showing scoped .22 rifles in use for sniper training?

I have never seen one Yet . Best Regards