I have a nice loaner JG AK with some internal upgrades that I let friends use . I mean , I bought it for this purpose so I try not to worry too much , but so far it ' s come back missing a screw on the stock and a new hole on the grip . Kinda frustrating when nobody mentions it . People aren ' t you , be careful who you loan gear to . Generally with friends you are more likely to have droppagesrough use than say stealing , but screen which friends you let use your gear . Some people are extra careful , others not so much . A good rule of thumb IMO is to ask if they can help cover any maintenance costs if it ' s shared and gets damaged . Broken piston grip ? Shredded piston ? No problem . split the cost . Generally if somebody is testing the water and they like it , you can try to convince them to buy a Cyma or something . If they are a repeat loaner , that ' s also a reason for them to get their own . I ' d say Five times max .