Sons of Liberty Gun Works Quick Ambi Safety, 90 Degree, Ambidextrous, Left Hand, Black QAS-90-Q-LH-LS The Quick and FCD's ASF is a joint project between SOLGW and FCD. The two companies have been collaborating on a few projects" starting with the 4140 steel MLOK sling mount (MSQ-H). Ambidextrous controls allow the user to manipulate the safety with both hands with a 90 degree throw. With the right side being the traditional length" the left side safety is shorter to not impede on normal handling of the firearm.