Harrison Design
Rock Island Armory TCM Premium FS Triggers
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All Rock Island Armory models · triggers →
Manufacturer
Rock Island Armory
Model & version
TCM Premium FS
Mounting details
MIL-STD-1913 Picatinny
Parts listed
3 total
What the compatibility labels mean
How we knowHow we check compatibility
- Lab testedFit checked by Firearm Lab for the recorded setup.
- Documented fitmentSupported by manufacturer, partner, or reviewed community evidence.
- Interface matchMounting details match, but this exact model and part have not been confirmed to fit together.
Check your exact model and part before ordering. Fitment limits
Harrison Design3
Based on manufacturer information — Oct 2026. May require modification — see notes.
HD-102-N Extreme Service Trigger
May require modification — see notes.
HD-103-N Extreme Service Trigger
May require modification — see notes.