Main unit Instruction manual Other accessories Everything in the photos is included. I believe it's 6 inches, but since it's been a long time, please research it yourself. It has been stored in a box, so I think it's relatively clean, but opinions vary, so please judge from the photos. It was working without problems until the last use, but I haven't confirmed its operation for this listing. It is quite old. I think the packing had some damage. You may need to replace the packing for use. Also, please research it yourself and judge from the photos. I cannot answer questions. Payment at convenience stores is prohibited because there are crazy users who abandon their accounts. If you absolutely want to pay at a convenience store, please purchase it when you arrive there and pay immediately. We do not accept refunds or returns to prevent fraudulent activities such as switching out items. Gas blowback Western Arms