This is currently only for the Airguners out there. Do you love the gun you have but are tired of it being a .177 or .22? Maybe you want a higher or lower caliber? Our company is the very first to switch your caliber size. Although the wait can be up to a week long because we have to order parts and do work on your gun a caliber change is definitely worth it. Give us a call or send a email and tell us what gun you have and what caliber you want. Depending on the gun you want changed we might have to custom  make a new magazine for you. If your a replica person you will love that new feature and feel to your gun. Call Or Email To Get Quote.