3.3 & 3.4 M249 Safety

The testing starts out very simply; does the safety work properly. Note that the tech spec is very specific on this, and yes, red showed when in fire, clicks were audible, and we performed extra tests regarding the springs for proper pressure. The sear and disconnector are visually available in the picture. It’s difficult to quantify 3.4’s sear engagement test in a photo unless there was a cutaway receiver (which defeats the point of testing a real one) but we were able to visually inspect full sear contact, and conducted some buttstock kinetic tests while the sear was engaged to ensure it was in solid contact.