FN SCAR-L: full disassembly & assembly

The FN SCAR (Special Operations Forces Combat Assault Rifle) is a gas-operated (short-stroke gas piston) self-loading rifle with a rotating bolt. It is constructed to be extremely modular, including barrel change to switch between calibers. The rifle was developed by Belgian manufacturer FN Herstal (FNH) for the United States Special Operations Command (SOCOM) to satisfy the requirements of the SCAR competition. This family of rifles consist of two main types. The SCAR-L, for "light," is chambered in 5.56×45mm NATO cartridge and the SCAR-H, for "heavy," is chambered in 7.62×51mm NATO. Both are available in Close Quarters Combat (CQC), Standard (STD), and Long Barrel (LB) variants.

The SCAR is manufactured in two main versions; the SCAR-L ("Light") and SCAR-H ("Heavy"). The SCAR-L fires 5.56×45mm NATO, fed from STANAG (M16) magazines. The SCAR-H fires the more powerful 7.62×51mm NATO from proprietary 20-round magazines. Different length barrels are available for close quarters battle and for longer-range engagements. The initial solicitation indicated that the SCAR-H would also be able to be chambered in 7.62×39mm M43 Kalashnikov cartridge and 6.8×43mm Remington SPC cartridge. However, FN is not currently offering them and they likely have been cancelled.

https://en.wikipedia.org/wiki/FN_SCAR

Don't try to recreate what you see in this video, as this is gameplay. This video was created using the game World of Guns:
http://store.steampowered.com/app/262...
This game is also available on Google Play, App Store, Amazon and other platforms.