For the MR76 it lists these as compatible antennas: https://documentation.meraki.com/Wireless/Product_Information/Overviews_and_Datasheets/MR76_Datasheet "List of compatible antennas: MA-ANT-20/21/23/25/27 " Out of those options, the MA-ANT-27 (dual band), MA-ANT-21 (5ghz only) and MA-ANT-23 (2.4 ghz only) seem like the best options to choose from. https://meraki.cisco.com/product-collateral/dual-band-sector-antenna-datasheet/?file https://meraki.cisco.com/product-collateral/5-ghz-sector-antenna-datasheet/?file https://meraki.cisco.com/product-collateral/2-4-ghz-sector-antenna-datasheet/?file Meraki is not the strongest at bridge links. I would be a bit nervous about this use case. I would personally use a dedicated bridge solution from another vendor.
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