It's impossible to verify how many defectors are fighting the regime, but the group's leader Col. Riad al-Asaad claims there are thousands of former soldiers in his ranks.
Friday's protest plans announced on activist websites come a day after opposition leader Burhan Ghalioun held discussions with the Free Syrian Army leader to assess the group's needs.
Thousands of people, most believed to be unarmed protesters, have been killed in the 10-month-old revolt against President Assad. Protests erupt every Friday, the start of the weekend in Syria.
