Hey I am the proud if not accidental owner of a new 535. ( the guy at walmart boxed me up a 535 instead of a 500) can't say I'm upset however I've noticed the barrel options seem limited! I want to get a 20" barrel with chokes for my weapon but can't find any online. Any suggestions on what to do? Will the best solution be to have a smith chop and reconfigure the 28" barrel? Any info is appreciated thanks!