That looks to be an AWOL. I tried to make the Tiagra 4503 work on my AWOL and eventually threw in the towel. I think the seat tube angle and chainline both combine to make the set up difficult. I'm thinking a braze on FD with a SRAM wide spacing adapter would help, see Amazon link below. I am now running a 105 triple on a 45 mm chainline and all is fine with one exception, if I run 2" 29'er tires I only have a few mm clearance between the derailleur and the sidewall of the tire when in the lowest gear, not a problem unless I have a truing issue on the road. I'm really starting to feel the bike is designed for a 47.5 mm minimum chainline and a double crankset.
Amazon.com : Sram Mountain Bicycle Front Derailleur Braze-on Wide Spacing Adaptor : Sports & Outdoors