Pick parts by role, catch compatibility issues before you order, and compare live retailer prices — all without a spreadsheet.
Choose from real parts organized by role — barrel, lower, upper, and more. No part numbers required.
Catch mismatches before you order. Gas system, buffer weight, caliber — flagged automatically.
See live prices from real retailers. Click through to buy — we never touch your order.
Builder preview — looping screen recording
No fluff. No upsells. Just the tools to plan your AR-15 right.
Pick parts by role so you're never guessing what fits where.
Catch obvious mismatches — gas system, buffer, caliber — before you buy.
Running total as you build, with real retailer listings updated regularly.
Create a free account to save builds and pick up where you left off.
Share a build URL with your buddy or your gunsmith. No login needed to view.
Explore parts and build freely. Create an account only when you're ready to save.
Battl Builders is a free AR-15 build planner that helps you select compatible parts, compare prices across retailers, and plan your build from start to finish — without juggling spreadsheets or browser tabs.
Unlike a generic parts list, Battl Builders understands AR-15 compatibility rules: gas system length vs. barrel length, buffer weight vs. stock type, caliber consistency across upper and lower. You get warnings when something doesn't match before you spend money on the wrong part.
Whether you're planning your first build or your tenth, Battl Builders gives you a structured, guided way to research parts and buy with confidence.
It's free, no account required, and takes about 5 minutes to start.
Start a Build →