Pick Parts. Build. Compare and Share.

Plan your build with interactive tools, learn from practical guides, and compare parts with real pricing—all in one place.

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What you'll find here

Everything in one place

From your first question to your final build—parts, pricing, guides, and planning tools all in one place, built for folks who wrench on rifles, hunt, compete, or just enjoy tinkering.

AR15 Builder

AR-15, AR-10, AR-9, AK & Glock Configurator

  • Platform selector lets you switch between AR-15, AR-10, AR-9, AK, and Glock-compatible with one click — the URL updates so you can share a pre-selected platform before saving.
  • Shows what's required vs optional with a clear progress meter; understands bundles and individual item overrides.
  • Replace any item in a bundle with your own choice — weight, length, and cost stay accurate.
Guides

AR15 Builder Guides

  • AR15 builder guides explain barrels, gas systems, triggers, optics, handguards, and muzzle devices.
  • Each guide focuses on tradeoffs so you can make informed decisions, not just memorize specs.
  • Cross-linked to relevant parts and planning tools throughout.
Tools

AR15 Builder Planning Tools

  • Four tools in one place: velocity, sound risk, gas/buffer pairing, and zero/holdover estimators.
  • Estimate expected ranges by caliber, barrel length, muzzle setup, and target distance.
  • Shareable links let you save and compare configurations.
Catalog

AR15 Builder Parts Catalog

  • Browse essential, accessory, and gear categories for AR-15, AR-10, AR-9, AK, and Glock-compatible builds — including Ammunition, Maintenance & Cleaning, and Training Devices.
  • Sort by name, price, popularity, or rating; filter by caliber, material, price, and more.
  • In-stock status shown across all listings so you can skip what's unavailable.
Brands

AR15 Manufacturer Brand Pages

  • Discover AR15 manufacturers with dedicated pages and indexed component counts.
  • Jump from a brand overview directly into each product category they offer.
  • Compare makers side by side when narrowing down your build choices.
Merchants

AR15 Retailer Merchant Pages

  • Browse public retailer pages with indexed catalog depth and merchant-specific inventory.
  • Jump straight into a merchant's scoped product listings by component category.
  • Use merchant pages when you want to shop by store instead of by brand.
Product Pages

AR15 Part Price History & Offers

  • AR15 part pages show merchant offers, lowest-price callouts, bundles, and specs.
  • Price history sits next to ratings and reviews so you know if it's a fair deal.
  • Add any part to your build; saved builds update on the server when you're signed in.
Price Alerts

AR15 Part Price Alerts

  • Set a target price on any component and get notified when it drops below your threshold.
  • Alerts are managed from your account and work across all tracked component types.
  • Pair with price history on product pages to know if a drop is actually a deal.
Discovery

AR15 Community Builds

  • Browse AR15 community builds with filters for name, user, price, rating, and weight.
  • Sort by newest, oldest, high/low price, rating, or weight.
  • Open any build to see components, totals, and what was skipped.
Saved Builds

Save & Share AR15 Builds

  • Save your AR15 builds to your account, edit later, or copy a build you like.
  • One-click share for Reddit, Markdown, plain text, or just a link.
  • Public pages allow voting, comments, and reporting to keep things clean.
Parts Cabinet

Track What You Own

  • Log the components you own — including spares — separate from what's slotted into a build.
  • See at a glance which parts are in a build, which are sitting on the shelf, and which are both.
  • Add quantities and notes to keep your stash organized.
Logbook

Shooting Logbook & Maintenance

  • Log range sessions with round counts, ammo, conditions, and notes — linked to a specific build.
  • Track maintenance by round count or date, with reminders for upcoming service intervals.
  • Public sessions appear on your profile and build pages.
Marketplace

AR15 Component Marketplace

  • Browse AR15 component and part listings by type, location, and price; complete rifles are not listed.
  • Listing pages include component breakdowns, condition badges, and contact and report actions.
  • Create and manage your own listings with multi-item and bundle support.