A few nice titanium machining images I discovered:
M240L 7.62mm Medium Machine Gun (Light)
Image by PEOSoldier
The M240L 7.62mm Medium Machine Gun (Light) incorporates titanium construction and option manufacturing techniques for fabricating major M240B elements to achieve considerable weight savings. These improvements minimize the Soldier’s combat load even though enabling less complicated handling and movement of the weapon. The M240L short barrel variant is 21.eight pounds, five.4 pounds lighter than the M240B.
The M240L is the program-of-record remedy to reducing the weight of the M240B. The M240L meets all of the reliability and operational traits of the M240B. It is rugged and reliable and has a minimum 50,000-round receiver life.
Spindle
Image by Ray Tracing
Helically machined 6al/4v titanium bottom bracket spindle.