No real reason, I like tinkering with things. Both my wife’s and my guns were great out of the box. The sites we play at do skirmish and film sim. For film sim, sometimes we are looking for a bit more reach. Seeing as the Keltec has a longer barrel (450mm) than my SPR (416mm) that I am modding to DMR, I thought it would be interesting to see if I could get some better range and accuracy from the Keltecs (although at less fps).
So far so good, learning by my mistakes etc. But really enjoying airsoft, modding and spending too much money.