The ASF-90 is a conventional (rotate to 90 degree for FIRE/SEMI) semi auto selector with q (offset) levers. ASF (Ambidextrous Selector, Forward Controls) and SOLGW's The Quick is a joint project between FCD and SOLGW. The two companies have been collaborating on a few projects, starting with the 4140 steel MLOK sling mount (MSQ-H in FCD alphabet soup parlance). Work began in Dec. 2018 to create a safety that's an embodiment of our not inconsiderable experience in AR15/M16 selector design and knowledge over the years. ASF was designed from the ground up to be a defense/duty/combat safety selector, its mission is quite aptly reflected by the way its levers are attached the center, via a stainless steel roll pin. The lever to center interface is immensely strong, the high shear strength (800 lbs) 420 stainless steel spring steel roll pin simply holds the two in place, and doesn't handle any load. One of the design goals dictates there be little to no wobble between the lever and center, we've called for very tight tolerances (+0.001/-0.00) on ASF's lever and center interface to achieve that.