Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
F.A.C. stands for Fire Arms Certificate. A F.A.C. (usually printed as FAC) is required in the UK for airguns over the 12 ft. lbs. of energy since anything over that limit is considered a firearm. FAC in the US is only relevant in that you know that a FAC airgun is not limited to 12 ft. lbs. or energy.
