Terms of Sale

Who sells it

Your order is processed by our online reseller Gumroad, the Merchant of Record for every order: Gumroad is the seller of record and handles the payment, any sales tax or VAT, and your receipt (Gumroad's terms). The Gun Mechanism Notebook is made and supported by Gus Explains Guns (“we”). Contact: support@gusexplainsguns.com.

What you buy

Digital books in PDF format, delivered by download right after payment. Nothing is shipped. The price shown at checkout is the price you pay; where tax applies it is shown at checkout.

Your licence

You may read, print and keep the files for your own personal use, on all your own devices. You may not share, resell, upload or redistribute them, in whole or in part.

Payment

Payments are processed by Gumroad. We never see or store your card details.

Refunds

14-day money-back guarantee — see the Refund Policy. It does not limit any statutory rights you have as a consumer.

Made with AI

Gus Marchetti is an AI-generated character. The text and illustrations were made with the help of AI and reviewed; the methods described are real.

Educational content

The books are educational. You are responsible for how you apply them and for your own safety. Safety-related figures follow official guidance at the time of writing; always check the current official guidance and local rules where you live.

Liability

To the extent the law allows, our liability for any claim relating to the books is limited to the price you paid. Nothing here excludes liability that cannot be excluded by law.

Governing law

The purchase itself is also governed by Gumroad's terms as the Merchant of Record. If you are a consumer, you keep the protection of the mandatory laws of the country where you live.

Last updated October 2026.