You are bidding on a used RAP4 M203 grenade launcher and grenade. These items cannot be made to utilize any real ammunition and where developed for paintball use. Here is what RAP4 has to say about these items: The Phantom Thunder Grenade Launcher is made out 100% metal. This unit is built to last and able to take all grenade shells. The unit can be mounted on any RIS 20mm or 7/8 weaver systems. To mount this grenade launcher on the T16, T68, RAP4 or any other paintball guns The M203 Thunder Grenade is the first paintball grenade built to utilize an already existing full product line of Grenade Launchers. The M203 Thunder Grenade fires up to 25 paintballs at once, but can be operated with as few as 1 paintball(s). Get within 25 feet of an opponent and let the paint fly. The M203 Thunder Grenade can operate on both CO2 and Green Gas. CO2 offers 800 PSI, while Green Gas only offers 100 PSI. For the best results, use your M203 Thunder Grenade Charger to fill each M203 Thunder Grenade with CO2. - Fits into any standard grenade launcher - you will need green gas or a grenade charger to power the grenade - charge the grenade under 600psi Please ask any and all questions prior to bidding. Local pickup is always welcomed. FedEX is used as a carrier and a tracking number will be provided upon payment clearing. Again, this item is for paintball use.