There have been a Mistake in the Shipment and I got non US version of PTP antennas, is there a problem of using them in US?
A “US version” just means it is locked down at the factory to comply with FCC regulations. You can use the “worldwide” version as long as you configure it properly. For example on Mikrotik 802.11ac devices, the country needs to be set as “unitedstates3” (the unitedstates1 and unitedstates2 are older versions of the regulations, and are kept in the code so things don’t break when people do upgrades). If the devices just has one entry for US, then make sure it is running whatever the latest stable firmware is and you should be fine.