Magazines sold in Delaware are capped at 17 rounds.

Delaware caps magazine capacity at 17 rounds. This means you cannot ship magazines holding more than 17 rounds to a Delaware customer, even if the magazine itself is legal in the state where your warehouse sits. Other firearms accessories—stocks, rails, grips, sights, holsters—face no similar restriction under this rule. The rest of this page covers what the limit does to your fulfillment, how to enforce it so an order does not leak through, and why your payment processor cares whether you ship into a state where your product cannot legally be sold.

What this means for your store

If you sell magazines, a 17-round cap means you must refuse or redirect orders from Delaware customers who select a higher-capacity magazine. An order that ships a 18-round magazine into Delaware is a violation of state law, and doing so repeatedly signals to an underwriter that your compliance controls are either absent or broken. Most merchants handling this rule set up a per-product shipping profile that excludes magazines above 17 rounds from the Delaware market, or use a product metafield to tag capacity and block high-capacity variants at checkout when the customer's address is Delaware. If you today allow customers to add any magazine to their cart and ship it anyway, or if you simply note the rule in a Slack channel and rely on manual catch, you will eventually ship a violation. The cost of getting wrong is both legal exposure in Delaware and a signal to your acquirer that you cannot control state-level restrictions.

The control that actually enforces it

A shipping profile is the control that makes this enforceable. In Shopify, create a shipping profile that excludes high-capacity magazines (18 rounds and above) from Delaware, then assign it to those product variants. At checkout, the customer in Delaware sees only 17-round options; anything higher vanishes from their cart. Alternatively, use a product metafield to tag each variant with its capacity, then configure your checkout or a custom app to block variants where capacity exceeds 17 when the shipping address is Delaware. If the control lives only in your head or a spreadsheet, you will miss an order when you are tired or busy. A systematic block inside your store data is what survives staff turnover and the chaos of a scaling business.

Why an underwriter cares

An underwriter reviewing your store sees magazine sales to a state with a capacity limit as a red flag unless you can show the control. They are not enforcing Delaware law—your processor is not a cop—but they are measuring your operational competence and your appetite for legal friction. Shipping a 25-round magazine into a 17-round state is evidence that you either did not know the rule or did not care enough to build a system to follow it. Both are underwriting problems. A Shopify shipping profile or a metafield-based checkout block is visible and auditable; it proves you know the rule and have mechanized compliance. That is what tips the underwriting conversation from suspicion to confidence.

Frequently asked

Can I sell magazines in Delaware at all?

Yes. You can sell magazines in Delaware as long as they hold 17 rounds or fewer. The restriction applies only to capacity. Magazines of 17 rounds or under ship normally. Higher-capacity magazines cannot be shipped to Delaware under state law, so you must exclude them from that market.

Do other firearms accessories like stocks, grips and sights have the same limit?

No. This rule applies only to magazines. Other firearms accessories—stocks, rails, grips, sights, holsters, cases and similar items—are not subject to a capacity restriction under Delaware law and can ship to the state without this limit. Check each product category against Delaware law separately.

What happens if I ship a magazine over 17 rounds to a Delaware customer by mistake?

You have violated Delaware state law and shipped a product that cannot legally be possessed in that state. Beyond potential legal exposure in Delaware, you have created an underwriting risk: your processor sees evidence that your compliance controls failed. If this happens repeatedly, it can trigger a review of your account or contribute to an underwriting decline.