That is what i was thinking, i was going to say "add-ons" lol but upgrades was the word, also i would rather (personally me) get a spring and upgrade it as it will work well in winter, i just won't like the look of this gun at 0 degrees lol ...hehe
spring and uprade to be honest, if you do that, and it fails, go and get the gas one, just not for winter...