I've been a gunner for some time now but realised only resetly how enjoible the alchemer series are as weapons. Not only are they challenging to use but they come in a whole bunch of varietys: Fire, Ice, Shock, pure Element and even pure Shadow. Why not complete the set and make a piercing alchemer.
The names could be like: Spiketech Alchemer -> Spiketech Alchemer Mk II -> Spike Driver -> Stalagtite Driver
The weapon works similary to the other guns in the series with the exeption that it would contain a fluid that crystalises when opposed to air, forming sharp spikes (similar to polyp spikes). The fluid would be pure yellow by its color and possibly have some darker cracks to distinguish it from prismatech and firotech. The damage of this weapon would be the same level as shadowtech and prismatech as it doesn't inflict status conditions.
I think many gunners would find this useful as all the other piercing guns are slow and disable your movement.
I appreciate we need more piercing options, since the current ones are a little unwieldy in certain circumstances.
However, alchemers don't strike me as the answer.
The name 'alchemer' gives the impression of elemental damage, alchemy being related to the study of elements. Shadow we can get away with by sort of fumbling the whole thing and saying alchemers fire energy bolts of compressed whatchamacallit, but piercing damage seems more similar to a weapon that produces physical (non-energy) bullets... I admit that a lot of things in SK don't make much sense, though.
An alternative would be a piercing-line Antigua, or possibly the introduction of a Snarbolax gun.