Knee locking, ACL tear. Should i do?

I had an accident in Oct'16. I was riding a bike, got slipped and whole weight of the bike went onto my knee as I used my leg to take support. I felt extreme pain and swelling. There was no fracture in Xray. After a week I had MRI which showed ACL tear, grade-II tear in medial meniscus, some contusion in the tibia and femur and lot of effusion and oedema in the knee area. There was also sustained swelling in calf region (to some extent it is still there till now). I did physio + exercise, ROM has now become stable at 10 degree extension and 140 degree flexion. Now, I have been advised to undergo arthroscopic surgery by some sports injury specialists for finding out the cause of knee locking and perform ACL repair. Some other senior ortho doctors have advised to wait until I gain full extension else the surgery may cause stiffness of the knee. Those calling in for surgery say that we should not delay as its already been 5 months. What should I do? I am very much confused.