PDF corrected 4th printing; v4.0 errata document.
Page 20, "Medium Weapons", first paragraph, last sentence.Original text: "In terms of construction, medium weapons may be mounted only on Small Support Vehicles or battle armor with anti-personnel weapon mounts."
Suggested change: "In terms of construction, medium weapons may be mounted only on Small Support Vehicles."
Reason: Following previous errata changes, APW mounts no longer support Medium Weapons. However, Battle Armor units with Armored Glove manipulators can still carry single-crew Medium Weapons. You may wish to mention this instead, but either way APW mounts should not be mentioned.
Page 190, "Special Enhancements", second paragraph.Text states that "Aerospace fighters and aerodyne Small Craft, by virtue of their design, already incorporate VSTOL capabilities, but may mount this equipment to eliminate the +2 penalty for attempting a vertical landing in atmosphere." However, the Sabutai (aerospace fighter) and Astrolux (aerodyne small craft) example text below contradicts this, and the Tech Base and Space sections do not mention ASF or aerodyne Small Craft (although the rules can be implied to be the same as for conventional fighters). This also bleeds into the question of whether aerodyne Small Craft and DropShips can make vertical landings in-atmosphere (see
rules question thread); that question should probably be decided before any changes are made here.
Page 233, "Snub-Nose PPC"Errata document states that "Extinct: 2790" and "Recovered: 3067 (Draconis Combine)" should be added to the entry. 4th corrected printing text instead states "Extinct: 2860 (Inner Sphere)" and "Recovered: 3037 (Draconis Combine)". Presumably one of these is incorrect.
Page 256, "Grenade Launcher"Introduction dates in the 4th corrected printing do not match what is listed in the errata document. Presumably one of these is incorrect (in this case, very possibly the errata document, as the errata text is a subset of the document text).
Errata document error (page 26)The errata for the battle-armor
Long Range Missile (LRM) Launchers and
Advanced Short Range Missile Launcher (found on
Page 26 of the errata document) are listed as being for Page 267. They are actually for Page 261. Both errata are nevertheless correctly implemented in the 4th corrected printing.
Page 285, Final Unit Cost Formulas Table, Support VehiclesEnd of the WiGE support vehicle cost calculation should probably be "(1+[Total Tonnage/25])" to match the other entries rather than the errata/currently printed text of "(1[Total Tonnage/25])".
Page 295, Heavy Weapon Ammunition (cont)Delete the Incendiary (LRM) entry entirely.
Page 297, Additional Battle Armor Weapons and Equipment (cont)Under "Fuel Tank", change Extinction from "-/-" to "2781/-" to match entry on page 255?
Page 346, Heavy Weapon Ammunition (Cont)A fragment of the deleted footnote related to Incendiary LRM capability is still present and should be deleted. Fragment reads: "Thunder); in such cases the heat, damage, range, and ammo capacity/weight statistics of the other missile type apply, but rack size is treated as 5 tubes smaller." and does not have an associated footnote mark.
Page 352, Conventional Infantry Weapons (Cont)Minor typo: the weight of the SRM Launcher (Standard, Two-Shot) is listed as "30.0 k" rather than "30.0 kg". This typo is also found in the replacement Infantry Weapon Tables errata document.
Errata document error (page 37)Errata entry 8 for the Inner Sphere Battle Armor Equipment Table (located near the top of Page 37 in the errata document) describes a change in a footnote related to Incendiary LRMs. This footnote should instead be listed as deleted entirely (which is correctly implemented in the 4th corrected printing). Errata entry 9 for the same table describes a change related to Capital Missiles (definitely not part of the table); this change is both properly described elsewhere in the errata document and properly implemented in the 4th corrected printing, so the entry should simply be deleted.