LB 10-X AutoCannon

Introduced in 2595 by the Terran Hegemony. The LB 10-X Autocannon is essentially a 'Mech-mounted shotgun, capable of firing special "cluster rounds" that split apart after being fired, allowing the weapon to either spread damage out or focus damage on a small area, depending on the range. LB-X Autocannons are able to use either the special cluster rounds or standard autocannon rounds. The LB 10-X Autocannon, having a higher caliber, causes higher damage than lower-caliber autocannons, though it is limited to medium ranges.

Comparison and related weapons

 * AC/10: The LB 10-X AC is an infamous strictly better version of the regular AC/10.
 * Ultra AC/10: Can shoot twice each turn, but can't use cluster or other special munitions.
 * LW 10-YZ AutoCannon: A parody of the LB 10-X AC being better. Strictly non-canon (but yes-cannon).

Models
The LB 10-X AC is manufactured on the following planets:

LB-X-P Type 10
Draconis Combine Prototype.

Mydron Excel
The Mydron version of the LB-10X is an 80mm autocannon.

NAIS Mk. 1
Federated Suns prototype.

Oriente Model O
Unlike many post-Succession War era LB 10-X Autcannons, the Oriente Model O is actually a Star League era weapon, whose manufacturing line survived the early Succession Wars - with production only ceasing due to the Inner Sphere-wide decline in material technologies. When the Helm Memory Core reversed this trend, Oriente Weapon Works was able to reactivate their idle production line in short order, rather than having to expend R&D efforts to do so.

Type KOV
The Type KOV is one of the more common Clan manufactured LB 10-X Autocannons.

Variants

 * LB-X-P: The Federated Commonwealth employed an experimental version of the LB 10-X during the War of 3039, giving it to certain elite units for field testing. While similar to standard models, these prototypes required an additional critical slot, were slightly less accurate, and could jam in certain cases.
 * LB 10-X-P: In development prior to the Reunification War, the LB 10-X-P was a prototype pushed into service with the Star League Defense Force in time for the closing years of the campaigns in the Rim Worlds Republic and Taurian Concordat. The LB 10-X-P was functionally identical to the LB 10-X, with the exceptions of requiring 1 additional critical slot, suffering a -1 modifier to the cluster hits roll when using cluster munitions, and jamming in a fashion identical to that of the Ultra Autocannon class of weapons on a to-hit roll of 2.

Multiple targets optional firing mode
Rather than firing at a single target, any type of autocannon can be “walked” across two targets close to one another. An LB-X autocannon firing a cluster shot is a special case.  No matter what type of autocannon is being used, both targets must be in adjacent hexes and within range of the weapon. Deter-mine the to-hit number for both targets and make separate to-hit rolls against each target, using the higher (more difficult) of the to-hit numbers and adding a +1 modifier for firing at multiple targets with a single shot. Note that this is not the secondary target modifier; that modifier does not apply to this type of attack unless multiple targets also are being attacked in the same phase. If the to-hit roll succeeds, the target is struck by a single hit that inflictsdamage equal to half the normal damage done by the weapon (rounded down).

For an LB-X autocannon firing a cluster shot, make a single to-hit roll against the highest to-hit number plus 1. If all damage is applied to the first target after a roll on the Cluster Hit Table, then no additional damage is applied to the second target. However, if some of the damage missed the target, use that “missed” Dam-age Value as the new number to roll on the Cluster Hit Table to determine what damage struck the second target. For example, a controlling player rolls a 7 on the Cluster Hit Table roll for an LB 10-X, resulting in six 1-point Damage Value groupings hitting the first target. That leaves  4  damage  and  so  the  controlling  player would then roll on the 4 column of the Cluster Hit Table to see what damage is applied to the second target.

When using this attack from a non-infantry unit against conventional infantry, treat the weapon as the next row above on the Non-Infantry Weapon Damage Against Infantry Table (see p. 216, TW). i.e. a Cluster (Ballistic) becomes a Direct Fire (Ballistic) attack.