Hi,
The strange thing with the 29th Bavrian regt is... only a portion of the troops were Bavarian... it was one of those regiments formed in late 1916 where they grouped Jäger battalions together, in the case of the 29th the 1st reserve Jäger battalion was Bavarian, but also from Prussia and other parts of Germany... even a K.u.K. Battalion was part of the regiment for a while!
So in this case he has a Tunic with Bavarian Lion buttons, what is probably a Prussian kokade... but an undefined unit... maybe part of the attached MG, Pionier or Radfahrer elements? I am not sure if the Jäger wore their original Battalion straps and only the stab wore a 29?
Very strange Mischung!!