Okay... Not to dismiss any of the fine contributions so far, but as far as its inclusion into AH the stuff posted so far is hard to read through. It's redundant and includes stuff like prototype torpedoes and photo recon that have no real place in the AH model.
I'm proposing a "What SHOULD it have" thread from this point on. I've put a lot of thought into this, and I think it gives us the best combination of capabilities and the least cluttered hangar screen as we squint horribly to read the fonts on what we want on our loadout. Keep in mind, you add the 10 million different experimental options and you'll never see them in the hangar!!
What I broke it down as (
Skip down to the bold to go straight to it):
4 categories:
1) Main loadout
2) bomb bay
3) wings
4) Centerline
Scroll down below for my list, but a little of my logic WHY before that:
1) Since the only main difference between the A and B is the 7mm vs 13mm MGs (seeing they both used the same engines), I would suggest the "main loadout" have both options. No reason, you say? Well in scenarios with timelines or setups with specific timing issues, it might come into play. Or if people want more peashooters to help "walk" rounds to a target and tap the cannons, etc.
2) For the bomb bay, you had guns on "trays" and bombs on "platters" and they would simply be mounted on the bomb bay. That's right, the bombs weren't on racks, they were on a platter that was then inserted. I'm hoping HTC can do this so that you get to choose bombs or guns but not both (as was historic). Naturally it could carry some bombs, but I think we all like the guns options so we need a good choice there as well.
I don't think it should have a BK5 simply because the gun was totally rubbish and didn't work. Historically it was produced, but effectively it was worse than simply loading the plane with 20mm and 30mm cannons (every source so far backs this up). In-game it would be so overpowering as to be a laugh. There were MANY options, however, the common themes follow a certain pattern. I've listed what, IMO, are the more common, more regular, more proven loadouts that we'd actually use in the game.
Example of 2x20mm "tray":
http://i5.tinypic.com/499vgcw.jpgExample of the 4x20mm "tray" load:
http://img250.imageshack.us/img250/5691/me410b245wz0.jpgExample of 2x Mk103 (diagonal muzzles on 103):
http://www.cockpitinstrumente.de/archiv/Dokumente/ABC/m/MK%20103/MK%20103/Bilder/Me%20410%20B-2%20U%201/001.jpg3) The 410 could carry the same WGRs as the 110, but could also carry a newer setup specific to the 410.
2x each wing:
http://img185.imageshack.us/img185/3503/me410b2u23om.jpg3x each wing:
http://i18.tinypic.com/491m0cj.jpgI don't know how MANY used this, but I've seen at least a few pictures. However, unlike the 110 I don't think it could carry bombs. It carried these on the centerline. I don't know about drop tanks either, as it apparently had a 1500mi range (might not have been needed?).
4) The belly would be capable of a pod similar to the 110G (but rounded more):
http://i10.tinypic.com/2ak9tgg.jpgIt could also carry 4x 50kg bombs on 4 small racks.
2 examples:
http://www.warbirdphotographs.com/LCBW5/Me410-2s.jpghttp://luftwaffefighters.co.uk/410/me410-4.jpgNaturally the fighter versions would not carry these to hit bombers, but when tasked with bombing something it was clearly one of the options. This does not get in the way of the bomb bay, you'll note, so I've separated it from that weapons list. Because they are mutually exclusive to the mission at hand, I think we can pull "double duty" and have both options on the same selectable plane in the hangar.
NOTE: All of these include 2x 13mm MG131 "tail guns" with 500 rpg each.
1) MAIN
2x 7.9mm MG17 with 1000 rpg and 2x 20mm MG151/20 with 350 rpg
2x 13mm MG131 with 600 rpg and 2x 20mm MG151/20 with 350 rpg
2) BOMB BAY
empty
8x50kg
2x250kg
2x500kg
1x1000kg
2x 20mm MG151/20 with 400 rounds (total, I think?)
4x 20mm MG151/20 with ??? rpg
2x 30mm Mk108 with ??? rpg
2x 30mm Mx103 with 100 rpg
3) WINGS
4x WGr.21
6x WGr.21
4) CENTERLINE
4x 50kg (on shackles that disappear when bombs not loaded)
1x 2x20mm MG151/20 gunpod with 200 rpg (based on other gunpod and bf110G gunpod)
I think this gives us maximum coverage from Schnellbomber to Zerstorer. It would be just as useful as a mossie or a p-38 in regards to ground attack AND heavy fighter. You might commonly see the gunpod with the 2x20mm tray, but that doesn't stop you from loading it with the 2x30mm or the 4x20mm trays. You suffer for it with weight and drag, but it lets you customize what you want. And yes, there are accounts of 8x20mm (2 main, 4 tray, 2 gunpod) and witnesses to its use in combat. Yes the missions did carry 2x 30mm and 2x 20mm gunpods sometimes (at least from what I've read they did on night fighter missions) so all these combinations were used.
It has taken quite a while to compile and type this up. I hope people find it helpful, or at least inspiring.
EDIT: P.S. I just realized the text on the 3-rocket setup says 15mm, not 21mm... Anybody know if this was done for 21mm also?