Due to recent events, I am forced to push this update to the workshop in an unfinished state. As much as it pains me to do so, it is better than leaving bugs for people to constantly wonder about. Amongst other things, there were supposed to be 2 new weapons added in this update, as each PBU includes 3 guns, but they have been trapped in development hell.
Unfortunately, I have not had the motivation to work on [ArcCW] BlackMod for over 3 years now and letting what has been finished sit on my hard drive is unfair to those of you who have been eagerly awaiting this 4th major update. So, despite all that may be missing, I hereby present:

Fourth Weapon Batch:
-Beretta Mx4 Storm

New Attachments:
-.17 Incinerator
-.410 Bore (S&W Model 500)
-Auto-Burst Receiver
-CLAW Heavyweight CQC Grip
-CUTLASS Scope (5x-500x)
-Coin Shot
-Custom Incinerator Barrel
-Cut Birdshot Shells
-Dart Gun Conversion
-Exploding Ammo
-MASAMR-0 Stimulant Darts
-Mercenary Certification
-MORNINGSTAR Aftermarket Bladed-and-Weighted Gun Stock
-Polymer Coated Ammo
-Rusted Internals
-Sealed Void Munitions Prototype #173-5A
-Wax Slugs

New Urban Coalition Attachments:
-40mm Marker Grenades
-6.5 Grendel Upper (M16A2)
-Executioner Rounds (Model 329, Desert Eagle)
-Gunpowder Propellant Experiment, Formula #22409 (IZh-58)
-M16A3 Custom-Built S13A Receiver
-Point Shooting Stance (M16A2)
-Special Powder Mixture, Revision #51320 (IZh-58)
-Weak Grip

New Black Ops Pack Attachments:
-Juggernaut Arms (M134)
-Juggernaut Kit (M134)
-Weapon Prototype #90 - Project Lead Storm (M134)

New BlackMod Attachments:
- Gunpowder Propellant Experiment, Formula #22409 (IZh-43)
- Special Powder Mixture, Revision #51320 (IZh-43)

Removed Attachments:
-PGM Hecate II Iron Sights
-Standard Anti-Tank Rounds

Weapon Changes:
All anti-tank/heavy weapons moved from slot 4 to slot 3.
All heavy weapon speed values tweaked.
All large caliber weapons (minus the SSK .950 JDJ) now deal damage to Gredwitch tanks by default (should also be able to damage other armored vehicles).
All weapon holster positions tweaked.
All weapon physics models have been fixed and overhauled.
All weapons can now be lowered.
Certain weapon sprint positions readjusted.
Certain weapon texture paths streamlined.
Firing animations will now finish before the bolt cycle animation plays.
Most weapon sounds have been overhauled, now using previously unused sounds along with utilizing a weapon's model for its sounds. Weapon sound files have also been combined into one, reducing overall lua file count.
Boys Mk. I:
• Sprint animation bug actually fixed
Carcano 1891:
• Extended mags increased to 9
• Muzzle attachment point fixed
• Reduced mags reduced to 3
• Underbarrel position moved up slightly
Fedorov Avtomat:
• Fixed material issue regarding fedorov_wood_m.vmt
• Now has “Gold Plating” skin
IZh-43 Sawed-Off:
• Double Barrel firing mode improved
• Lua file renamed for organization
• Moved from slot 3 to slot 1
• Range overall damage decreased
• Sprint animation position and speed tweaked
• Viewmodel position tweaked
PGM Hecate II:
• .qc file cleaned up and model reworked
• Damage and DamageMin values swapped
• Now has custom skin
• Now uses missing sound file for bolt cycle, sounds resynced
• PGM Hecate II changed back to PGM Hécate II
• Range lowered
• Recoil increased
SSK .950 JDJ:
• Charms position adjusted.
• Damage raised.
• DamageMin lowered
• Now has VisualRecoilMult of 5
• Shells made a bit smaller
Tankgewehr:
• Damage and Range raised
• DamageMin lowered
• Penetration halved
Wz. 35:
• Damage raised
• DamageMin lowered
• Now uses “custom” optic mount.


Attachment Changes:
"HDS Flip Sight w/ OPK-7" corrected to "HDS Flip Sight w/ OKP-7", adjusted holosight size and positioning, removed excessive zoom levels, default magnification reduced to 1, description updated.
.50 BMG Cartridge can now overheat and explode, reload speed buffed, name changed to be less vulgar.
.50 Beowulf 20-Round Casket Mag buffed to be more in-line with the rest of the attachments, file name corrected.
.50 Beowulf 5-Round Compact Mag file name corrected.
12 Gauge Slugs description tweaked.
Anti-Matter rounds renamed to Antimatter Rounds, added an extra number to damage values, muzzle velocity now matches damage values.
Antimatter Rounds file renamed from "ammo_skullsmasher" to "ammo_ggn40_skullsmasher" to avoid confusion and potential conflicts, damage multipliers set to a damage override for a flat damage across all weapons.
Bandit Style hold position and angle changed, hip spread nerfed.
Brain Cells name changed to Hammer.
Custom Stock recoil buffed slightly, ADS speed nerfed slightly, renamed to Custom-Made Stock, con updated to be less vulgar.
Doom Shells now has a disclaimer, can now be used on Urban Coalition weapons, can now jam.
EOMPTS Master sight visibility improved, custom texture removed.
Experimental Taser Rounds now increases reload time, file named fixed.
Gunsmith Offensive required files are now included: as such, Gunsmith Offensive is no longer a requirement.
Grease stats tweaked, slightly nerfed.
HDS Flip Sight w/ OKP-7 zoom lowered.
HUDLR renamed to HUD-LR, given proper abbreviated name.
Hair/Heavy trigger no longer change weapon recoil values.
Jury-Rigged Explosive Ammo can now overheat and destroy the weapon, now enables jamming.
Leupold Mark 4 scope visibility improved.
MOONGAZER (Multisight) Mk. II name fixed, positioning corrected, reticle now included, sway added, handling slowed, visibility improved.
Mount Weapon cons updated.
Muzzle Brake X was renamed to Muzzle Brake Mk. X.
Plague Darts now has full name, rebalanced.
Prototype Sear Mk. II can no longer be put on manual action weapons.
Quicker Draw recoil buffed, now increases handling for that true Hollywood cowboy experience.
Rappeler's Barrel name changed to CT Accuracy Rappelling Gun Barrel, pros, cons, and neutrals updated.
Raufoss Ammo disclaimer removed (nobody cared lol), true name changed to Raufoss Mk211 "HEIAP" Munitions.
Raufoss and Antimatter Rounds can no longer be used on Black Ops Pack guns.
Removed unused files.
RPG-7 Mini Nuke detonation sounds fixed. (I fucked with the wrong values, lmao)
Rubber Bullets damage buffed to 15, damagemin nerfed to 1.5.
SLAP Rounds renamed to Saboted Light Armor Penetrator Cartridges, given AbbrevName.
STAR Reengineered renamed to STAR Re-engineered, shotgun heat dissipation buffed.
SUNBEAM (SPOTLIGHT) Mk. II flashlight FOV and sway reduced, visibility improved.
SUNBEAM Spotlight changed to SUNBEAM Floodlight, can now be used on pistols, overall brightness reduced.
Sabotaged Ammo stats tweaked, can now be used on Gunsmith Offensive weapons, given a proper icon (no more trolling :woeisme:).
Several attachment descriptions, pros, cons, and neutrals have been rewritten or tweaked. Try and find what has changed!
Several attachment icons have been tweaked, remade, or created.
Several attachment lua files renamed for organization, may result in preset issues.
TARS PRO-MOD scope visibility improved.
Tank Hunter Rounds RPM and Cycle Time values decreased, reload penalty buffed.

Carcano 1891, Tankgewehr now have c_hands; Big thanks to Stained Soldier for helping out with this!
Boys Anti-Tank Rifle Mk.I, Carcano 1891, Fedorov Avtomat, IZh-43 Sawed Off, and Tankgewehr now have shell ejection
Tankgewehr optic and underbarrel attachment bones changed, positions adjusted, sprint position override removed, shell size shrank to better reflect its actual size
ISh-43 Sawed Off now has barrel length values
S&W Model 500 given new muzzle flash, third person attachment positions fixed
Several weapon barrel length values have been adjusted
STAR Reengineered slightly tweaked for snipers; heat dissipation and delay values increased (slower)

Carcano 1891 optic placement adjusted; now uses optic rail, proper suppressed and distant firing sounds, and inventory/kill icon
Fedorov Avtomat optic mount changed to an optic rail
IZh-43 Sawed Off now shows optic rail in third person
PGM Hecate II tactical positioning moved, all attachment positions realigned
Tankgewehr now uses optic rail

Fixed typos; all "Mk.II" text should now read "Mk. II"
Fixed Hecate charms being detached
IZh-43 weapon and attachment worldmodels fixed, files renamed, Tactical position adjusted

Third Weapon Batch:
-Carcano 1891
-IZh-43 Sawed Off
-PGM Hecate II

New Attachments:
-.50 BMG Cartridge
-STAR Reengineered
-Heavy Trigger
-Mount Weapon
-Leupold Mark 4 (4.5-14x)
-MOONGAZER (Multisight) MK. II
-TARS PRO-MOD (5-25x)
-SUNBEAM Spotlight
-VOID Suppressor Mk.II
-RPG-7 Mini Nuke

New Urban Decay Attachments:
-.50 Beowulf 5-Round Compact Mag

Boys ATR sprinting bug """"""fixed"""""", Underbarrel slot removed
Fedorov Avtomat optic angle corrected, now uses extended mag bodygroup, reloads improved, ADS bolt and muzzle flash fixed
Wz. 35 sprint animation angle adjusted
Fedorov Avtomat, Wz 35 now have optic rails
S&W Model 500 can now use optics, ADS speed slowed
Tankgewehr move speed buffed
Boys ATR, 950 JDJ, Tankgewehr can no longer reload in ADS, ADS slowed
Boys ATR, Tankgewehr sprint animations slowed slightly
950 JDJ now has c_hands
950 JDJ, Tankgewehr iron sights magnification lowered
950 JDJ, Boys ATR, Tankgewehr, Wz 35 movement/ADS speeds adjusted based on weight and bulkiness, ShootVol adjusted
All weapons with built-in bipods have had bipod dispersion buffed

All weapons now have proper HUD icons, distant firing sounds, and crouch angles/positions
Ammo icons made more consistent with other ArcCW icons in color and size
Model files reorganized, may result in an error or two
Moved attachment sound files, attachment icon pathing updated for organization
Select, powerful attachments labeled as NotForNPCs
Several lua file renames, will result in guns defaulting and attachments unequiping
Among these is Technician, to avoid conflict with UC Extras, has been renamed to Gunsmith and buffed
Tweaked attachment descriptions

.50 Beowulf 20-Round Casket Mag tweaked to be more in-line with the rest
12 Gauge Slugs should be bound to Shotguns now
Aftermarket, Aftermarket Compact, Vampire V2 scope positions adjusted
Anti-Matter Rounds tweaked
Doom "Slugs" reworked, renamed to Doom Shells
HUDLR now gives 400% Sighted Strafe Speed
Hair Trigger now usable on UD weapons, reduces trigger delay on UD weapons, firerate nerfed
IRONSHOCK Reforged buffed
Perks "Back to Basics" and "Grease" moved from Training Package to Internals for UD weapons. "Brain Cells" remains unchanged
Plague Darts usable on shotguns and Urban Decay weapons, penetration set to 0.5, cons updated, can now jam guns
Prototype Sear Mk. II tweaked, can now jam, now usable on UD weapons
Quicker Draw tweaked
Rubbet Bullets are now forced physbullets with lowered muzzle velocity, damage type changed to DMG_CLUB (Blunt damage)
SAT Rounds lua file renamed, will unequip old version from all guns that have it after updating
SLAP Rounds rebalanced, can now jam, "muzzle brake" warning removed (not worth adding as a feature)
SUNBEAM Mk. II zoom adjusted, now progressively gets brighter
Sabotaged Ammo tweaked, can now be used to troll
Uzi 4.6" Pistol Barrel given a disclaimer that it does not use an optic rail

New Attachments:
-12 Gauge Slugs

Weapon Changes:
-Fedorov Avtomat reloads slowed
-950 JDJ reload slowed to a more desirable level
-S&W Model 500 reload sounds fixed

Attachment Changes
All attachment descriptions updated to use a clearer method of writing, may or may not unequip all BlackMod attachments.
Rubber Bullets now fire a single projectile on shotguns, can be use on GSO weapons
IRONSHOCK Reforged now has BlackMod tag and Desc_Neutrals
Rappeller's Barrel Jump Dispersion set to 0
Aftermarket Scope description updated
Custom Stock cons updated
Aftermarket Scope slightly realigned
SUNBEAM Mk.II now has point-shooting alternate model

Decelerator description corrected
Dual Stage Auto V2, Accelerator V2 renamed to Dual Stage Auto 2.0, Accelerator 2.0
Removed unnessecary .png files
Reverse Dual Stage Auto, Protosear Mk.II now have icons
Protosear Mk.II print name changed
HUDLR Cons tweaked
Anti-Matter Ammo now uses DMG_DISSOLVE

Second weapon batch now have proper weapon descriptions
Weapon barrel lengths, world positions adjusted

Boys ATR sounds for reload and cycling slightly adjusted, should now fit animations better
S&W Model 500 can no longer use shotgun rounds, iron sights realigned
Experimental Taser Rounds duplicate removed

Second Weapon Batch:
-Boys Anti-Tank Rifle Mk. I "Boyes ATR"
-Fedorov Avtomat "FAAR"
-S&W Model 500 "Bigger Iron"

New Attachments:
-IRONSHOCK Reforged
-Rappeller's Barrel
-SUNBEAM (SPOTLIGHT) Mk.II