Thanks for all that hard work, gave me somewhere to start from, if you wanna help this is the spreadsheet I've been working on (goo(dot)gl/7ijY0S ) just shoot me a PM and i can get you a editing link to it, I don't have The Giant unfortunately as of yet. And at the moment I have Nightmares IDs and Shadow Of Evil IDs pretty complete so far. ( also some of yours were incorrect for the upgraded version I referenced the wiki for mine

)
SOE Preview
------------------------ Shadow of Evil ------------------------
-Submachine Guns-
Vesper – Level 4 - ID: 2 / 19 (Infernus)
VMP – Level 8 - ID: 4 / 22 (The Impaler)
Kuda – Level 16 - ID: 7 / 15 (Crocuta)
Pharo – Level 23 - ID: 9 / 17 (Whispering Regurgigator)
Weevil – Level 29 - ID: 11 / 24 (Barrage)
-Light Machine Guns-
BRM – Level 12 - ID: 59 / 71 (Blight Oblivion)
Dingo – Level 19 - ID: 61 / 67 (Dire Wolf)
48 Dredge – Level 27 - ID: 63 / 69 (Trapezohedron Shard)
Gorgon – Level 31 - ID: 65 / 73 (Athena's Spear)
-Assault Rifles-
Bootlegger Level 0 - ID: 6 / 26 (Ein Sten)
ICR-1 – Level 2 - ID: 27 / 41 (Illuminated Deanimator)
KN-44 – Level 7 - ID: 29 / 39 (Anointed Avenger)
M8A7 – Level 17 - ID: 31 / 47 (The Unspeakable)
Sheiva – Level 20 - ID: 33 / 49 (Cumulus Struggle)
HVK-30 – Level 25 - ID: 35 / 43 (High Velocity Kicker)
Man-O-War – Level 31 - ID: 37 / 45 (Dread Armada) 14...?
-Sniper Rifles-
Locus – Level 11 - ID: 75 / 81 (Arrhythmic Dirge)
Drakon – Level 14 - ID: 77 / 83 (Bahamut)
SVG-100 – Level 24 - ID: 79 / 85 (Ikken Hissatsu)
-Shotguns-
KRM-262 – Level 5 - ID: 51 / 57 (Dagon's Glare)
Argus – Level 13 - ID: 52 / 56 (Ancient Messenger)
205 Brecci – Level 18 - ID: 53 / 58 (Stellar Screech)
Haymaker 12 – Level 33 - ID: 54 / 55 (Shoeshining 100)
-Secondaries-
Bloodhound - Level 0 - ID: 88 / 95 (Meat Wagon)
Bowie Knife – Level 0 - ID: ??
MR6 - Level 1 - ID: 87 / 91 (Death and Texas)
RK5 – Level 9 - ID: 89 / 93
L-CAR 9 – Level 22 - ID: 90 / 94
XM-53 – Level 28 - ID: 97 / 98
Wunderwaffe DG-2 - ID: 101 / 102 (Wunderwaffe DG-3 JZ)

Originally Posted by
Titan X
Hi All,
Im pretty new to this forum but have some previous experience, just want to share a few of these weapon ID's.
A few of these may make your game crash, or glitch. But are often just special weapons.
I have only tested these on The Shadows of Evil. Cant guarantee workingness on The Giant. Will test later.
The Shadows Of Evil:
101 - Wunderwaffe DG-2
102 - Wunderwaffe DG-3 JZ
2 - Vesper
4 - VMP
6 - Bootlegger
7 - Kuda
9 - Pharo
11 - Weevil
13 - Razorback
15 - Crocuta (Pack a Punched Kuda)
17 - Whispering Regurgitator (Pack a Punched Vesper)
19 - Infurnace (Pack a Punched)
22 - Impaler (Pack a Punched VMP)
24 - Barage (Pack a Punched Pharo)
26 - Ein Sten (Pack a Punched Bootlelegger)
27 - ICR-1
29 - KN-44
31 - M8A7
33 - Sheiva
35 - HVK-30
37 - Man-O-War
39 - Annoited Avenger (Pack a Punched KN-44)
41 - Illuminated Demonator (Pack a Punched ICR-1)
43 - High Velocity Kicker (Pack a Punched HVK-30)
45 - Dread Armarda (Pack a Punched Man-O-War)
47 - The Unspeakable (Pack a Punched M8A7)
49 - Columus Struggle (Pack a Punched Sheiva)
51 - KRM-262
53 - 205 Brecci
55 - Shoeshining 100 (Pack a Punched Haymaker)
57 - Dagon's Glare (Pack a Punched KRM-262)
65 - Gorgon
75 - Locus
88 - Starting Pistol (forgot name :P)
The Arbgwaoth Family!:
125 - Kor-Maroth
126 - Mar-Astagua
127 - Nar-Ullaqua
128 - Lor-Zarrozor
129 - Kor-Maroth Arbgwaoth
130 - Mar-Astagua Arbgwaoth (better kor-maroth, i think)
131 - Nar-Ullaqua Arbgwaoth ( i dont even know anymore)
132 - Lor-Zarrozor Arbgwaoth (fml)
139 - Ray Gun / Porters X2 Ray Gun (Pack a Punched)
138 - Ray Gun
The Giant
Take any gun above, and take away 1 from the value.
e.g 11 = Weevil, so now its 10 = Weevil.
(sometimes, atleast. try both.)
33 - HVK-30
35 - Man'O'War
51 - 205 Brecci
57 - BRM
75 - Drakon
96 - Wunderwaffe DG-2
97 - Wunderwaffe DG-3
4150 - Ancient Messenger (Pack a Punched Argon)
364558 - Crucuta (Pack a Punched Kuda)
364587 - Dread Armada (Pack a Punched Man-O-War)
This is due to be edited at any time. Keep checking back for updates,
This took me a while to get, so if this helped, leave a thanks and a comment with any more confirmed ID's 