Not sure which parts work together? We'll walk you through it. Pick your components, get warned about anything that won't fit, and see real prices from real retailers — all in one place.
No experience required. No part numbers to memorize.
Browse real components organized by what they do — barrel, trigger, lower, upper, and more. No prior knowledge required.
Gas length, buffer weight, caliber — Battl catches the mismatches before you spend money on the wrong part.
Live prices from real retailers, side by side. Click through to buy. We never touch your order.
Builder preview — looping screen recording
NO SUBSCRIPTIONS · NO SPONSORED RANKINGS · NO BULLSHIT
Parts organized by function. Know what you need, not what SKU to search for.
Gas system, buffer weight, caliber — flagged before checkout, not after the box arrives.
Running total with live prices. No estimated MSRP. What it actually costs, today.
Free account. Save builds, pick up where you left off, run multiple configs in parallel.
One link. Your buddy sees the full parts list — no login, no friction, no excuses.
Browse and build freely. Create an account only when you're ready to save.
Battl Builders is a free AR-15 build planner — the tool you've been doing in spreadsheets, rebuilt for how builders actually work. Select parts by what they do, validate compatibility as you go, and price your build across multiple retailers without opening a new tab.
Most AR-15 compatibility mistakes happen at the parts list stage: wrong gas system length for the barrel, buffer weight that fights your stock, caliber mismatches between upper and lower. Battl flags those conflicts automatically, so you catch them before they cost you a return label.
Whether you're planning your first rifle or spec'ing a dedicated precision upper, Battl Builders gives you a structured, guided way to research parts and buy with confidence.
Free. No account required. Takes five minutes to get rolling.
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