Attachments Being Removed

I'm not sure about other guns but I know that if you take the bipod off the M240L it will deselect attachments to put it back on. Select the gun, remove the bipod and use all the attachment points, go into a game and it will put the bipod back on and remove other attachments. After you fix it in game it will stay that way until the game ends, in the lobby you will see the bipod is back on.