Escape from Tarkov show of their weapon customization and alpha gameplay footage, quite an in-depth customization system with a variety of modifications, check the rest here.
More Gameplay footage
Escape from Tarkov is a hardcore MMO mixture of first-person shooter / third-person shooter and role-playing gameplay. The game offers a new kind of gameplay based on a multitude of tactical and combat factors and the use of additional modules that improve game realism.
Events take place in a realistic setting in the Russian city of Tarkov. Main characters work for two private military companies locked in bloody conflict on the streets of the settlement surrounded by UN forces and Russian Military. Players need to find a way out of the isolated Tarkov, survive the deadly hazards and unearth all mysteries of the city. Following the wildly twisted plot, heroes of Escape from Tarkov meet many dangers – from hostile mercenaries of enemy faction to aggressive environment. Death may come suddenly in a multitude of ways: character may perish because of consequences of different injuries, illnesses, exhaustion and radiation poisoning. To survive in a harsh and unpredictable world, players use numerous MMO system modules: users can control all actions and movements of their character and choose from a wide range of behaviors and tactics.