In your studies you show that there are three groups of saints, old testament, church, and tribulation. Are the disciples considered old testament or church saints?
According to Matt. 11:13, the Old Testament (Law and Prophets) ended with John. Therefore the Disciples would be considered the first Church age believers. They received the Holy Spirit the night Jesus rose from the grave (John 20:22). But their relationship with Israel is a close one. They were all Jewish. Four of them were given a specific prophecy about Israel at the End of the Age (Matt. 24-25) and Matt. 19:28 says they have been chosen to assist the Lord in judging Israel after the 2nd Coming.