Battl Builders
AR-15 BUILDER·100% FREE·71,043 PARTS TRACKED

Stop guessing.
Start building.

Pick parts by what they do, not by SKU. We flag the gas-system, buffer, and caliber mismatches before checkout — and price your build across every retailer in one window.

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LIVE · BATTL INDEX
updated 14s ago
AVG COMPLETE-BUILD COST
$910+0.0% / 30d
LIVE BUILD FEED
0Builds published
$0.0Tracked across retailers
0Parts cataloged
0Compatibility rules
THE PROCESS

3 steps. One Battl-ready build.

01

Pick your parts

Browse real components by what they do — barrel, gas, trigger, lower. No part numbers to memorize.

02

Flag the conflicts

Gas length, buffer weight, caliber. Battl catches mismatches before you spend money on the wrong part.

03

Pull the trigger

Live prices from real retailers, side by side. Click through to buy. We never touch your order.

Open the builder
PRICE TRENDS · LAST 30 DAYS

Watch the part you want, before you need it.

Average street prices across every retailer we track. Tag any part to watch it; we'll ping you when it drops.

Complete Upper Receiver+0.5%
Avg
$1047
Complete Lower Receiver+3.0%
Avg
$447
Optic-51.6%
Avg
$608
Magazine+5.6%
Avg
$57
Lower Receiver-1.1%
Avg
$349
Iron Sights-6.9%
Avg
$67
HOT PARTS · WEEK 21

What real builders are saving.

··
PartCategoryWasNowΔRetailersAction
Walther PPK Magazine 380 ACP 6-Round Standard Black2246024Magazine$47.99$14.99-68.8%2
+ Add
Walther Magazine PPK 380 ACP 6-Round Nickel With Finger Rest2246010Magazine$51.99$19.99-61.6%2
+ Add
Savage Magazine Box Assembly 6.5x284 Norma Matte Blued55234Magazine$99.99$38.99-61.0%1
+ Add
Walther PPK Magazine 380 ACP 6-Round Finger Rest Black2246026Magazine$47.99$18.99-60.4%2
+ Add
Walther PPK/S Magazine 380 ACP 7-Round Finger Rest Black2246030Magazine$47.99$19.99-58.3%2
+ Add
Walther PP, PPK/S Magazine 32 ACP 8-Round Standard Nickel5136818Magazine$47.99$19.99-58.3%2
+ Add
Leupold DeltaPoint Pro Base Springfield Dovetail Matte Finish 1 Inch Optic Platform170910Red Dot Optic$49.99$21.81-56.4%1
+ Add
Walther PPQ Magazine 22 22 Long Rifle 12-Round51060002Magazine$46.99$20.99-55.3%2
+ Add
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Spec your next rifle without opening a single spreadsheet.
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CONFLICTS CAUGHT EARLY

Gas length, buffer weight, caliber — flagged before the box arrives.

Most AR-15 mistakes happen at the parts-list stage. Battl runs 23 compatibility rules over your build, every time it changes. If something fights, you'll know — with a one-click fix.

  • Gas system length vs. barrel profile
  • Buffer weight vs. stock
  • Caliber / chamber match
  • Bolt face vs. case head
  • Handguard inner ø vs. gas block
CONFLICT · Gas-system mismatch
Ballistic Adv. 16" Mid-Length Barrel
BCM Carbine-length gas tube
SUGGESTED FIX
Switch to BCM Mid-Length gas tube — same retailer, same shipment, +$2.
BUILD 0x4F·82A — 11.5″ Mk1823/23 rules · 1 warning
YOUR BUILD STARTS HERE

Free. No account. Five minutes.

Pick a starting point. Browse parts. Save your build when you're ready. We never charge you. We never touch your order.

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