Air rifle won't work...it will penetrate the skin but won't kill the darn things...and forget about head shots it won't pierce the cranium...it will only slow them down...trust me I know I had to beat one to death after discovering the pellet gun won't kill...I know inhuman but live and learn... to catch and release you can purchase a "Havahart" trap at reno but it's going to set you back 100$ and then you will have to drive the bugger a ways away so he doesn't come back....last summers total catch was 9 and I already have lost a tomatoe plant to one of the rodents....I wish I could borrow your gun and shoot the little Bastards....