The stripes look very dark. The photograph emulsions used at the time usually showed red as very dark. Red stripes = artillery. Artillery = few personal weapons issued - they looked after the guns FIRST - and maybe a few privately bought. Does he look as though he could afford any? The bowie knife was a common subject on early 'I've just joined' photos, but seemed to disappear on campaign.The belt buckle does not look like any issue belt buckles. Conclusion: an early photograph of a newly promoted member of an artillery regiment recording his service with some borrowed weapons.