Any semi auto will of necessity be a PCP, which opens up a new, somewhat expensive, can of worms. You have to buy a scba or scuba tank to fill it or buy a hand pump.
yes and it appears those hand pumps are about $160
And the $160 Bemnjamin pumps are worthless. Constant seal rebuilds. A good FX pump is twice the price but lasts longer between rebuilds. The best bet is a used scuba tank and a nearby scuba store to fill it. Or do what I did- buy a Bauer 4500 psi compressor and a few used scba(firemen’s) bottles. But I have 6 Daystate PCP’s and use a LOT of air....
