How to maintaine a device

Always check a device before practice.
A device opening must be free of debris and inserts are free movable.
A grip strap and grip butt must be not movable and intact.
A hand strap must be intact and firmly attached to a device.
Stop practice immediately if some damage is found, it can lead to injury. Lubricate a device by a synthetic oil. Use WD-40 or similar kind – one, small push in an opening. Do not use a thick lubricant, like Grease, it will stop a bullet to free move inside a device. Do not overfill – it will spatter to eyes in an action. Lubricate a device every 6 month or as needed. Avoid a device contact with water.