Robbins290
Member
I bought a used gamo bulk whisper bone collector 177 cal air rifle used. Seems to be in ok shape. It's soo weak it won't punch a beer can past 50 feet. It's rates for 1,300 fps with pba ammo. I tried to google rebuilding them. But found nothing. I've never own a air rifle. So I'm totally clueless on anything about them.