Geissele HK MR556 Two Stage Trigger
The Geissele MR556 Trigger is a drop-in, non-adjustable combat trigger that shares the same features as the standard SSA. Trigger and hammer are made from quality tool steel to ensure ruggedness and dependability. First stage pull weight is approximately 2.5 lbs. and 2 lbs. on the second stage for a total of 4.5 lbs.