Choosing a refit
Open Company Information > Equipment and choose Convert a Mek on the unit card. The button is shown only when an eligible alternative exists. Search and select a replacement in place; JavaScript updates the quote without resetting the page. Ordinary links and forms remain available without JavaScript.
BV is calculated from the exact saved MTF source, not inferred from a MUL match. Missing, unsupported or inconsistent sources cannot be purchased as verified targets.
The GM sets Technology region (GM) in company details to Inner Sphere or Clan. Existing companies use Inner Sphere until changed. Affiliation and paint schemes do not grant technology access.
Every component must pass the campaign year and regional technology checks, including engine, cockpit, gyro, armor, structure, heat sinks and Omni configuration. Clan technology is excluded from Inner Sphere refits before 3050; from 3050 it must also satisfy Clan introduction dates. This models potential refit access, not guaranteed local merchant stock. No month-specific introduction dates are invented.
A later catalog variant can be used as an era-legal refit only when its components pass these checks. It receives 25% minus one percentage point for each year until introduction, with a minimum of zero, provided it is a published source design. For example, DRG-5K introduced in 3050 receives 24% in 3049. A future introduction never bypasses component technology checks. The saved year, source and costs are checked again before payment.
Conversions preserve existing damage and do not repair the unit. Source-calculated sale credit and the existing applicable miniature discount are shown before confirmation; the transaction is audited.
The replacement list shows eligible choices only. Unavailable variants and exclusion counts are not listed. Calculation failures are software diagnostics, not a player review or approval task; no estimated BV is substituted.
Override Mek cards, their builder and live previews calculate base BV from the same authorized source used for conversion quotes. A missing MUL entry does not make that calculated BV unverified; saved BV and card configuration cannot replace the source result.