You sure can...but the dirt will eventually jam it up in the gun. I wouldn't reuse them on a good gun. Now, on the crappy ones at walmart it wouldn't be so bad. But, seriously, you can spend some serious bucks. THe Airsoft version of the Intervention sniper rifle is around 5k, with scope options that reach near 10k. You can find a good, fully automatic rifle, with a metal gearbox (feels just like the real thing) for about 130-150.