EMC Gemini FREE, EMC Gemini kit FREE with every LV1/1.1 or ETEK5 purchase. If you haven't already checked out the EMC Gemini kit then you should. It's a pretty sweet rail
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Marker Parts – tagged EMC KITS – Planet Eclipse USA
Marker Parts – tagged EMC KITS – Planet Eclipse USA
Planet Eclipse EMC Etha Rail Mounting Kit - Review
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Eclipse EMC Gemini Rail Mounting Kit for ETEK5, LV1, LV1.1 (Earth) : Sports & Outdoors