Airgun 101 have jumped on the fx bandwagon iv herd a few donnys on different guns and a hw100 mod is prob better in fac a a&m marksman twice as quiete there alot of ppl had some good stuff done by Liam but also alot have had leaks when they have got there guns back off him and the prices they charge you shouldn't have problems don't no why you say the fx shroud and mod not good if you get your tune right there not that bad in fact I have been using either a sak mod or a&m on mine for a while just to get them a little quieter