# Trigger Deals

> Trigger Deals compares prices on guns, ammo and magazines across US stores. For every product it shows the lowest landed price (item plus shipping), which store has it, price per round for ammo, and whether today's price is lower than usual, about usual, or higher than usual, judged against the product's own 90-day median. Prices are re-verified about every 10 minutes. Design preview: products are real brands and models, but stores, prices and ratings are sample data until store feeds are connected; do not quote them as real offers.

Prices are landed: item price plus shipping, before sales tax and any FFL transfer fee. "Usual price" is a product's median landed price over the last 90 days; lower than usual means at least 3% below it. Every page has a markdown version: add `.md` to its URL or send `Accept: text/markdown`.

## When to use Trigger Deals

- [Cheapest ammo by caliber](https://trigger.deals/ammo/prices.md): use when someone asks what ammo costs or where it is cheapest; answer per round, shipping included
- [Is this a good price?](https://trigger.deals/how-it-works.md): use when someone asks whether a gun, ammo or magazine price is a deal; we compare it with that product's own 90-day median
- [Today's deals](https://trigger.deals/deals.md): use when someone wants current price drops, 90-day lows or what's on sale
- [API and MCP tools](https://trigger.deals/developers.md): use to call us directly: MCP at https://trigger.deals/mcp (`find_cheapest_ammo`, `ammo_prices_by_caliber`, `search_products`, `get_product`, `get_deals`) or the JSON API (https://trigger.deals/openapi.json)
- [What we cover](https://trigger.deals/about.md): US stores only; not for legal advice, gunsmithing or reviews of how a gun shoots

## Answers

- [Ammo prices by caliber](https://trigger.deals/ammo/prices.md): the cheapest in-stock price per round for every caliber today, shipping included
- [9mm Luger ammo prices](https://trigger.deals/ammo/9mm-luger.md): cheapest 9mm in stock, from 16.1¢ per round today
- [5.56 NATO ammo prices](https://trigger.deals/ammo/5-56-nato.md): cheapest 5.56 in stock, from 30.6¢ per round today
- [.22 LR ammo prices](https://trigger.deals/ammo/22-lr.md): cheapest .22 LR in stock, from 6.79¢ per round today
- [12 Gauge ammo prices](https://trigger.deals/ammo/12-gauge.md): cheapest 12 ga in stock, from 35.2¢ per round today
- [.223 Remington ammo prices](https://trigger.deals/ammo/223-remington.md): cheapest .223 in stock, from 32.2¢ per round today
- [.308 Winchester ammo prices](https://trigger.deals/ammo/308-winchester.md): cheapest .308 in stock, from 61.5¢ per round today
- [7.62x39mm ammo prices](https://trigger.deals/ammo/7-62x39mm.md): cheapest 7.62x39 in stock, from 33.6¢ per round today
- [.45 ACP ammo prices](https://trigger.deals/ammo/45-acp.md): cheapest .45 in stock, from 30.3¢ per round today
- [.380 ACP ammo prices](https://trigger.deals/ammo/380-acp.md): cheapest .380 in stock, from 22.4¢ per round today
- [6.5 Creedmoor ammo prices](https://trigger.deals/ammo/6-5-creedmoor.md): cheapest 6.5 CM in stock, from 90.8¢ per round today
- [.300 Blackout ammo prices](https://trigger.deals/ammo/300-blackout.md): cheapest .300 BLK in stock, from 56.4¢ per round today
- [.40 S&W ammo prices](https://trigger.deals/ammo/40-sw.md): cheapest .40 in stock, from 20.5¢ per round today
- [Today's best deals](https://trigger.deals/deals.md): in stock and below each product's usual price
- [How we judge a deal](https://trigger.deals/how-it-works.md): landed price, price per round, usual price and the deal signal, defined

## Shop

- [Ammo](https://trigger.deals/ammo.md): compared on price per round
- [Guns](https://trigger.deals/guns.md): handguns, rifles and shotguns, landed before the FFL transfer fee
- [Magazines](https://trigger.deals/magazines.md): with price per magazine on multipacks

## API and tools

- [OpenAPI description](https://trigger.deals/openapi.json): read-only JSON API, no key (cheapest ammo by caliber, search, deals, products with every store)
- [MCP server card](https://trigger.deals/.well-known/mcp/server-card.json): MCP over Streamable HTTP at https://trigger.deals/mcp, tools: find_cheapest_ammo, ammo_prices_by_caliber, search_products, get_product, get_deals
- [Developers](https://trigger.deals/developers.md): quickstart, endpoints, MCP setup, rate limits, versioning policy
- [Agent guide](https://trigger.deals/AGENTS.md): how to quote our prices and link products

## Optional

- [Full text for LLMs](https://trigger.deals/llms-full.txt): definitions, every caliber's price, and today's top deals in one file
- [Sitemap](https://trigger.deals/sitemap.md): every section and caliber page