The forward controls design ASF-90 is a conventional semi auto selector with standard levers or off-set levers known as Q levers. Please see pictures above to see different options.
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. ASF centers are billet machined in 8620, heat treated and black nitrided. Levers are billet machined in 8620 and black nitrided.
The end cap is for those that don’t wish to have a lever on the weak side of the receiver. With the end cap, ASF becomes a convertible selector (between ambidextrous and non-ambidextrous.)
ASF is shipped with a selector spring, a KNS nitrided selector detent, two levers (or one lever, with an end cap) and 4 roll pins (two are needed for installation, with 2 spares). The ASF is shipped with the levers partially assembled without roll pins.