Also consider the latest FX pump. Similar price. I have no experience of them, but being FX made I'm sure they of good quality. Novel feature is they are switchable between 2, 3 and 4 stages by turning a knob, so you can work up as the pressure increases, like changing gears on a car. Possibly added complexity, more to go wrong, and not sure of easy access to service parts in the UK.
They claim that their moisture trap eliminates the need for Dry-Pac etc. Which as said I am still a little skeptical about anyway.
This thing:
FX Four Stage Hand Pump
Re regulators, I am not so sure. My HW100 is regulated and has been utterly reliable. Can be taken to bits and completely re-sealed with just a few allen keys, (not had to yet but have a seal kit just in case, inexpensive) and has a sublime trigger and magazine system. My first PCP was a BSA Ultra, one of the first batch ever made, which in a fit of enthusiasm I took to a chap called Tweaky (or Tench), Rolls Royce engineer in Derby, who fitted his then novel regulator whilst I watched. That certainly improved it, but has needed attention a couple of times to re-seal it. XTX Air used to supply seal kits but are no longer trading, so I'm not sure what happens next when they go again.
It upped the shot count in this tiny reservoir from maybe 30 to 50 shots, which were also noticeably more consistent. However after re filling I had to dry fire it a few times for the regulator to settle down again, which was/is a nuisance.
Perhaps newer designs are better.
The concept of regulation seems attractive, but the reality is that they work by running the rifle at a fixed low pressure, maybe 90 BAR or so. All the extra energy in say a 200 BAR fill is wasted as it is dropped in the regulator. Nevertheless you can possibly cram in a bit more air volume at pressures which would not work properly in a simple unregulated design.
For an FAC rifle like your S410 I would resist adding one, as designed it should be pretty good, if you keep it in the sweet spot of fill pressure range.
As said, regulators add cost and complexity, unreliability and require setting up, or at least checking, when fiddled with. At some point they will require maintenance, which if you have to pay someone to do for you will cost. When mine failed it was sudden, which could have been a real nuisance if I had to rely on only that rifle.
PS: how are you filling your rifles at the moment ?
www.airriflepump.com
