Talk:Crescent Rose/@comment-5118745-20131118033204/@comment-139.102.158.35-20141008015745

Your biggest chanllenge would be the scythe mode sniper rifle barrel. Specifically, it appears that the barrels are housed within each other, and conventional propellent and ammo won't work with that as they would have different inner radius.

As far as I can see, if you want to use conventional propellent, the only way to make it work is a multi tiered sabot round, one for every stage of the barrel except the last(where it would be "nude"). Starting with the biggest sabot and biggest barrel, it progressively shed a tier of sabot as it goes into smaller barrel. This would also explain why the sniper mode can't have a fast rate of fire while the rifle does, as ejecting all the sabot would be difficult considering that they cannot be ejected from the front.

Further more, the clip would have to composed of two parts, a ammo section and a sabot holder. In rifle mode, it would just fire the ammo like any other gun but in sniper mode, it would need to join the ammo with a sabot before being chambered.

Alternatively, if you can effectively downscale a rail gun, magentic propellent would not be hindered by the barrel size differences.(conventional is because if the round is too small, the pressure would escape from the side instead of propelling it). Thou Crescent Rose doesn't seem to be a rail gun based on firing sound and animation.

Other than that, all the mechanics seem to be sound, the only problem is finding the right materials as due to the collapsable nature of the weapon, each component is probably a very thin shell of some sort(so they can stack together), this would mean you need very strong material. This is especially problematic if you really want the gun to be able to propel the user, as that would mean a very powerful explosion and thus a very tough chamber and barrel.(of course, to have the scythe not break when you swing it would also require a very strong barrel)