The Geissele Super Dynamic-Combat (SD-C) Trigger featuring an exclusive flat trigger bow, is a rugged, nonadjustable combat trigger with a sear design that provides a wide margin of safety against unintentional discharges yet still gives the operator a sharp, repeatable trigger release. Type: 2 Stage 1st Stage Weight: 2.5lbs. 2nd Stage Weight: 2.0lbs. Total Pull Weight: 4.5lbs. Adjustable: No Recommended Use: Law Enforcement, Home Defense, Hunting Pin Size: Mil-Spec All weights are approximates. Please note, our triggers are designed for mil-spec AR15/M4 carbine rifles. Our AR15 triggers are not compatible with the Sig MPX/MCX weapons. The SSA-MPX trigger will be available in 2017. Please call 610-272-2060 for details. The Geissele Super Dynamic-Combat (SD-C) Trigger featuring an exclusive flat trigger bow.