BUILD LAB
VOIDFLOW
every attachment · stacked stats · shareable builds
SHARE THIS BUILD
  1. 1PICK A WEAPONAK, M4 or SCAR — tabs at the top.
  2. 2CLICK A SLOTon the gun, or use the slot tabs above the part list.
  3. 3HOVER TO PREVIEWclick a part to equip it. Totals stack up in BUILD STATS.
  4. 4SHARECOPY LINK — anyone who opens it gets the same build.
WEAPON click a slot to browse its parts

HOW IT WORKS

Short answers to the questions everyone asks.

What do the numbers mean?
Every value is a % change vs. the base weapon, exactly as the in-game Modify screen shows it. All parts simply add up. Green = better, red = worse. For recoil, kick and spread lower is better; for speeds and recovery higher is better.
Why is a slot greyed out or marked BLOCKED?
Some barrels don't allow a muzzle or an underbarrel — same rule as in the game. Equipping such a barrel removes the blocked part automatically.
What does STOCK mean?
The part the weapon comes with. RESET puts every slot back to stock.
How do I compare parts quickly?
Hover a part in the list: BUILD STATS shows current → new and the gun highlights what changes. Click to equip; click an equipped muzzle or underbarrel again to take it off. Use SORT to rank parts by any single stat.
What is AUTO-BUILD?
Give the stats you care about a priority with the ■■■ boxes in BUILD STATS (1–3), open AUTO-BUILD and press the button. It checks every legal combination and shows the top results — hover to preview, click to apply. Click ◇ PIN on a slot to keep that part no matter what.
What do the filters do?
Under FILTERS, click a stat once for ✓ improves (only parts that make it better) or twice for ⊘ no penalty (hide parts that make it worse). Right-click clears one.
How do I share a build?
COPY LINK gives a link that opens the exact build. The short code (BC1-…) works too — paste it in the box at the top. Codes keep working when new parts are added.
What is the SANDBOX?
A playground for parts that don't exist (yet). Start from your build, click any part on the blueprint and rewrite its stats: pick a stat, type ±%, add as many lines as you like. It never changes your real build and has its own share link (SBX1-…). Sandbox values are not game data.
Which weapons are covered?
The AK, M4 and SCAR families — every variant of a family shares the same parts. Optics, upper barrel and side rails have no stats, so they're not listed.
A value is wrong / a part is missing
Stats were captured by hand from the game, so a typo can slip through. Report it on GitHub.
Privacy
No accounts, no cookies, no ads, no tracking, no third-party requests. ★ owned parts, priorities and sandbox edits are stored only in your own browser.