APX A1 sights and trigger questions

Just picked up a used APX A1 full size from my lgs and looking for recommendations for suppressor or co-witness sights to use with a Holosun 507. Also really surprised at how heavy the trigger pull weight. On my digital tester it averaged out to be slightly under six lbs (5.13) on average with a few pulls being over 6 lbs. Are there any options out there to reduce the trigger pull?

Just picked up a used APX A1 full size from my lgs and looking for recommendations for suppressor or co-witness sights to use with a Holosun 507. Also really surprised at how heavy the trigger pull weight. On my digital tester it averaged out to be slightly under six lbs (5.13) on average with a few pulls being over 6 lbs. Are there any options out there to reduce the trigger pull?