if it is the Umarex version you have very few if any options, i had one of Umarex versions shot two full mags thru it then traded it off for a S&W M&P .22, it is a nightmare to clean,
there is an adjustment for shooting different brands of .22 ammo, which also is a pain in the rear end !!
before you shoot it, while it is still NIB, consider selling it or trading it for a S&W M&P .22
that is my best recommendation
