GunBroker and Gun Store POS Payments: What Works With Your Processor

Every POS system and marketplace handles card payments in one of three ways. Which one yours uses decides how free you are to change processors.

Three things change depending on which model you're on:

• Auto-posting. An integrated processor sends the sale total to the card reader and posts the result back to the ticket. No double entry, and your end-of-day numbers match. A standalone terminal works with any POS, but staff key every sale in twice.
• Lock-in. If your processor drops firearms, a built-in or partner-only system limits where you can go next. Dealers have found themselves hunting for a new processor and new software at the same time.
• Rates. Bundled pricing is often a flat rate that's hard to compare. With your own merchant account you can ask for interchange-plus pricing. Our guide to gun store rates, fees and reserves shows how to compare offers.

GunBroker is a marketplace, not a payment processor. Its seller help center says it "does not accept payment for items on behalf of sellers." You collect payment yourself, in one of two ways:

Immediate Checkout (with your own gateway)

Buyers pay by card on GunBroker the moment the listing ends, and the money goes directly to your bank account through your payment gateway. To turn it on, you need a merchant account connected to a gateway GunBroker supports. As of September 2026, GunBroker's preferred gateways are:

• Authorize.Net
• Elavon
• Fluid Pay
• Fortis
• NMI

Setup is in My GunBroker → Toolbox → Setup Checkout. You pick your gateway, enter its credentials, and run GunBroker's $1.00 test charge. Each listing then needs a credit card payment method and a fixed shipping cost to qualify for Immediate Checkout.

One thing to know about Authorize.Net on GunBroker: GunBroker's own setup notes point out that Authorize.Net restricts the types of transactions it accepts. In practice, the merchant account behind the gateway has to be approved for what you list. Our guide to accepting cards on your online gun store explains how the gateway and merchant account fit together.

Standard Checkout (payment outside GunBroker)

No gateway? You can still use Standard Checkout. The buyer submits their details through GunBroker, and you collect payment outside the site, for example by running the card in your own POS or accepting a money order.

What's not allowed

Since January 1, 2022, GunBroker has prohibited person-to-person apps, including PayPal, Zelle, Venmo, Cash App, Apple Pay and Google Pay, for firearms, parts, accessories and ammunition. It also doesn't support wire transfers. Payments made those ways aren't covered by GunBroker's Buyer Protection Program.

Source: GunBroker Help Center, articles on supported gateways, checkout setup and seller payment methods, checked September 25, 2026. Marketplace policies change, so check GunBroker's current pages before you list.

Here's what each major gun store POS vendor says publicly about payments. Where a vendor doesn't say, we've written "not publicly documented." That doesn't mean no. It means you need to ask.

Sources, all checked September 25, 2026: gunstoremaster.com; celerant.com/partners/gun-storemaster; rapidpos.com (gun store and fast checkout pages) and rapidgunsystems.com; orchidadvisors.com/gun-store-pos-software; trident1pos.com/solutions/2a-payments; bravostoresystems.com/integrated-payments; celerant.com/industries/sportsman; microbiz.com/gun_store_payments. Vendors add and drop processors, so confirm with the vendor before you decide.

Two common points of confusion. Searching for Gun StoreMaster payment processing? Gun StoreMaster handles your A&D records, not your cards, so the processor question goes to whichever POS it's paired with. Looking into Rapid Gun Systems credit card processing? Rapid builds payments into its system, so ask which processors its gateway can connect to before you assume you can bring your own.

The pattern is clear. Most gun store POS systems choose the processor for you, or give you a short list. That's not a bad thing if the partner treats you well. It becomes a problem when a processor exits firearms, or when you want your counter, website and GunBroker sales on one account.

If your POS doesn't integrate with the processor you want, you still have options: a standalone card terminal next to the register, or a virtual terminal (a browser page for keying in card payments) for phone orders. Both work with any POS. The cost is double entry at the counter.

Many dealers end up with three payment setups: the POS's processor at the counter, something else on the website, and a third arrangement for GunBroker. It works, but it's three statements, three sets of fees and three support lines.

Where your systems allow it, one merchant account behind one gateway is simpler. With a firearm merchant account approved for every channel you sell through, you get:

• One statement and one rate to check each month.
• One gateway login. Authorize.Net can serve your website checkout, GunBroker Immediate Checkout and a virtual terminal for phone orders.
• One relationship that already knows your business when something goes wrong.

Disclose every channel up front

This is the part dealers skip, and it matters. An account approved for counter sales isn't automatically approved for online or marketplace sales. Online orders are "card-not-present," which underwriters treat as a different risk. When you apply, list every place you take cards: the counter, your website, GunBroker, gun shows and phone orders. Undisclosed channels are a common reason accounts get reviewed or closed. See what to do if your account is shut down.

Also remember that disputes from every channel count toward one chargeback ratio on a shared account. GunBroker buyers who never receive a transfer can dispute the charge like any other customer. Our guide to chargebacks for gun stores covers how to keep them low, and the firearm dealer payment compliance guide covers the thresholds.

Ask these before you sign anything new. Get the answers in writing.

1. Which processors and gateways do you integrate with today? Is Authorize.Net one of them?
2. Is processing required to use your software, or optional?
3. If I use a processor you don't integrate with, what still works? (Standalone terminal, manual entry, reporting.)
4. Which card readers are supported, and can I buy rather than lease them?
5. Does your website or ecommerce module use the same processor as the counter?
6. How do your GunBroker and marketplace integrations handle payment? Inventory only, or orders and payments too?
7. Where do recurring payments (range memberships, layaway) and stored cards live, and can they move if I change processors?
8. Is there a fee or contract penalty for using an outside processor?
9. How long does a processor change take, and is there downtime?

Then follow the order in our guide to switching processors without downtime: get approved first, test, and only then cancel the old account.