Warning:

This expansion is still in beta, use it wisely and cautiously! 

Updating: 

0.1.1 - 23/6/2019: Edit those vanilla Tier-3 Ammo Conversion receivers, convert them into advanced receivers with higher firing rate and 3/4 more damage. Add independent Constructible Objects for .308 Winchester converting to 8mm Lebel, .50 BMG and 5.56 mm Battle Rifle for its vanilla caliber and two of .45 Schofield. Tier-3 Advanced receivers for Bolt-Action Rifle and Battle Rifle mods are also available. 

Note: 

As a user of New Calibers, I always feel odd when I see those weapon mod with the caliber that NC has but without customisation keywords in accordance with... So I decide to create keywords myself. 

New Keywords:

ma_300BL - Honey Badger in Wasteland Melody's Service Rifle by WastelandMelody
--.300 Blackout (Standard)
--7.62x39mm
--5.45x45mm
--5.8x42mm
--5.56x45mm
--.223 Remington 
--7.92x33mm Kurz
--6.8mm SPC

ma_762TokPistol - Tokarev TT-33 BETA by Covadonga
--.45 ACP 
--.22 LR
--.30 Mauser
--7.62x25mm Tokarev (standard)
--.40 Smith and Wesson
--.357 SIG
--.38 Super
-- 9mm Luger
-- 9x18mm Makarov

ma_303Rifle - Lee Enfield No.4 Mk.1 - Britain's Finest by asXas
--.303 British (standard)
--6.5x55mm Swedish
--.308 Winchester
--8mm Mauser
--8mm Lebel
--7.5x55mm Swiss
--.338 Lapua
--.30-06
--7.62 NATO
--7.62x54mm Rimmed
--.30-30 Winchester
--6.5 Carcano
--6.5 Arisaka
--7.7 Arisaka
--7mm Mauser
--7.65 Argentine
--.300 Win Mag
--.458 Win Mag

ma_8mmMauserMG - MG42 and MG34 by wardaddy755--8mm Mauser (standard)
--.223
--.30-06 Springfield
--.308 Winchester
--7.62mm NATO
--.338 Lapua
--50 BMG
--5.56mm
--5.7mm
--7.5mm Swiss
--7.62x39mm
--7.62x54mm Rimmed
--7mm Mauser
--7.92x33mm Kurz

ma_9MakPistol - Makarov PM by AlexScorpion
--9x18mm Makarov  (standard)
--9mm Luger
--.22 LR
--.32 ACP
--.380 ACP
--.38 Super
--.40 S&W
--.45 ACP
--8mm Nambu

ma_9SMG - MP5 by wardaddy755
--9mm Luger (standard)
--.22 LR
--.32 ACP
--.380 ACP
--.38 Super
--.40 S&W
--.45 ACP
--8mm Nambu
--9x18mm Makarov