Materials
The densities every mass check reads, each quoted from a page that states it. A gun's weight, a cartridge's mass and an attachment's heft are all density times volume; the registry is where the density comes from, and this page holds each figure to its source.
What it asks
Every material's density is quoted from a page that still states it: the check reads each source again and requires the quote on it.
Every quoted density falls inside the range its material declares across the grades firearms use.
Every material value the catalogue records (a frame, slide, barrel or stock material) is covered by a registry material, so a mass check can read its density. A value no material covers is a task: an alias of a material already registered, or a new material with its own source.
How it is calculated
Every mass check rests on mass being density times volume, and every density comes from a page that states it. This page checks the registry; the Methods tab holds it.
Answer: 7.85 g/cm³ lies inside 7.75 to 7.9, so the source and the range agree.
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What happens to a finding
- Every run is published here as it happened, failures included, before anyone has looked at it.
- Each run is also kept as a report that lists what was fixed since the run before, what is new and what is still open, so progress is measured finding by finding rather than claimed.
- No check edits the catalogue. A finding goes to a person, who corrects the record by hand and cites what the correction rests on; the next run confirms it.
- A check id is never renamed, so a link to one keeps meaning the same question.