Colorado caps magazine capacity at 15 rounds

You can sell firearms accessories in Colorado, but magazines are subject to a capacity limit of 15 rounds. This is different from most other restricting states and creates a real problem for any merchant serving multiple states: a blanket policy will either block you from shipping compliant magazines to Colorado, or allow you to ship non-compliant ones elsewhere. This page covers what the rule does and does not cover, how to enforce it inside your Shopify store, and what payment processors look for when they assess the risk of a magazine retailer.

What this means for your store

The rule affects every magazine listing you sell. A magazine over 15 rounds must not ship to Colorado; a magazine of 15 rounds or fewer can. If you have operated without per-product shipping rules by state, you now need them. The cost of error is significant: shipping a non-compliant magazine to a Colorado customer is a violation of state law that puts your store in breach of contract with your acquirer and directly triggers underwriting review. You cannot rely on post-sale checking or customer compliance. Existing customers in Colorado who have already received restricted magazines cannot be told to return them—the liability exists from shipment, not retention. A migration from a blocked processor to one that accepts magazine retailers requires proof you have enforced the 15-round limit during your time on the old processor.

The control that actually enforces it

The control lives in Shopify's shipping profiles. Create a product metafield for magazine capacity in rounds (integer, not free text). Then build a per-product shipping profile that blocks any magazine exceeding 15 rounds from shipping to Colorado ZIP codes. This must be a system rule, not a note to the fulfillment team. A note in someone's head will eventually be ignored, and the cost of that slip is an order in breach of state law and a chargebacks review. Test the rule monthly by attempting a test shipment of a 16-round magazine to Colorado; it must fail at checkout.

Why an underwriter cares

A high-risk underwriter treats magazine capacity violations as evidence of a control failure that is independent of the legality of selling magazines themselves. Magazine retailers are flagged at every processor, but the flag is green only if you can produce documentation of per-product shipping enforcement. Colorado's 15-round limit—rather than 10 like neighbouring states—is cited by acquirers as a reason to suspect you have a blanket geographic rule that over-blocks or under-blocks. Evidence that you use Shopify shipping profiles to enforce a product-specific limit is what the underwriter is looking for.

Frequently asked

Can I sell magazines in Colorado at all?

Yes. You can sell magazines with a capacity of 15 rounds or fewer to Colorado customers. Magazines exceeding 15 rounds must not ship to Colorado. This is a product-level rule, not a category ban, so you remain a magazine seller—you simply cannot fulfil certain products to that state.

What if I sell magazines in multiple capacity levels and a Colorado customer orders the wrong one?

The order must fail at checkout before payment is taken. Shopify's shipping profiles enforce this by product. If a customer adds a 16-round magazine to their cart and tries to check out with a Colorado address, the system must block it or raise an explicit warning. Do not rely on customer selection or post-purchase intervention.

Why do payment processors care about magazine capacity limits?

Underwriters treat state-law shipping violations as a control failure, separate from the product category itself. They assess whether you can actually enforce a rule that differs from state to state. A 15-round limit is different from 10, which means blanket rules fail. Proof of per-product enforcement is what an acquirer requires before they will underwrite your account.