I bought a huge product from Redwolf Airsoft and they included this grenade as a free gift. I have no interest for it, never used it, and im not familiar with how to operate it. Normally sells for $115 in Evike. Will sell it cheaper here. I recommend doing your own research about this grenade. I have no advice lol. Compatible with green gas or propane Has extra O-rings Includes a dogtag necklace User manual