Hello,
Yes, you can direclty Install RU7.
Migration paths
Symantec Endpoint Protection 11.0.7000 (RU7) can migrate seamlessly over the following:
Symantec Endpoint Protection 11.0.2000.1567 (MR2), 11.0.2010.25 (MR2 MP1), 11.0.2020.56 (MR2 MP2), 11.0.3001.2224 (MR3), 11.0.4000.2295 (MR4), 11.0.4010.19 (MR4 MP1), 11.0.4014.26 (MR4 MP1a), 11.0.4202.75 (MR4 MP2), 11.0.5002.333 (RU5), 11.0.6000.550 (RU6), 11.0.6005.562 (RU6a), 11.0.6100.645 (RU6MP1), 11.0.6200.754 (RU6 MP2) and 11.0.6300.803 (RU6 MP3)