You cannot switch. You can cancel for a 10% fee. But do not let it expire or you lose both your money and the gun. Many people stop paying expecting a refund, but it won't happen. You'll lose everything that way.

CANCELLATION AND ORDER CHANGE FEES
We invest time and money to prepare every order that is placed on our site, even before the order ships. After you have placed your order online, or over the phone with a sales associate you will be charged 10% Cancellation/Change fee if you decide to cancel the order or substitute products. You will not be charged any additional fee for adding items to an existing order. By placing an order online or making a phone order with a sales associate you agree to pay this 10% Cancellation/Change fee should you cancel or change your order. Our business is not set up to change orders easily. We apologize for having to implement these changes, but it is necessary in order to keep our prices low for our customers.

Buds states clearly in their layaway details that they do not. This is a questionable practice (since the firearm is new and unopened) in my opinion. I would contact Buds regardless and ask anyway due to the reasons given. This is "one aspect" of their layaway that if enough of their customers bring to their attention, they perhaps may change.

Unfortunately no. You can cancel your original layaway for a 10% fee. Then start a new layaway if you wish.