Jarvis, Inc.
Rock Island Armory TAC Ultra CS Barrels
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All Rock Island Armory models · barrels →
Manufacturer
Rock Island Armory
Model & version
TAC Ultra CS
Mounting details
MIL-STD-1913 Picatinny
Parts listed
6 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
Jarvis, Inc.1
Based on manufacturer information — Aug 2026.
KKM Precision4
45ACP Clark/Para Ramped
May require modification — see notes.
45ACP Un-Ramped
May require modification — see notes.
45ACP Un-Ramped with .578×28 Suppressor Threads
May require modification — see notes.
45ACP Wilson/Nowlin Ramped
May require modification — see notes.
Oriskany Arms1
1911 Match Grade Barrel, 45 ACP, 3.5", Stainless Steel, Standard Ramp
May require modification — see notes.