[FONT=Verdana, Arial, tahoma, sans-serif]I bought a sak a few months back for my .17 HMR. There are exploded view in the instruction leaflet for some reason, as according to this paperwork you never have to dismantle these mods.[/FONT]
If it's on a short barrelled HMR they are probably right, it will have lost the first baffle before it's clogged up.
Mine lasted less than a 1000 rounds on my 14inch annie, at that point the first and most of the second baffle was gone
and when I unscrewed it to have a look it snapped the baffle body in two.