HK MR 556 Trigger

The HK MR 556 trigger is similar to our SSA Trigger and can be used in both the HK 556 and semi-auto HK 416's.

HK MR 556 Trigger Specification

Type: 2 Stage
1st Stage Weight: 2.75 - 3.0 lbs.
2nd Stage Weight: 1.5 - 1.75 lbs.
Total Pull Weight: 4.25 - 4.75 lbs.
Adjustable: No
Pin Size: Mil-Spec


All weights are approximates.


Geissele Automatics two stage trigger for the HK MR 556 rifle

HK MR 556 Trigger Notes

After installing the MR 556 trigger you must cock the hammer in order to engage the safety unlike the HK trigger system where you can place the selector on Safe with the hammer forward.

Click here for the HK MR 556 replacement Springs

Click here for HK MR 556 replacement Trigger Pins

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