In a word, yes.
They are a purpose-built, dedicated open class marker. If you know you want a Sniper based pump, there is no substitute.
On the other hand, you can not convert them to semi without some serious and probably irreversible work. If you think you might want to go that route, the next best option would be to pick up a Series 5 and you could slap a CCM front block kit on it and you're in business.