Please tell me about the screw(s) which hold the muzzle brake/ false muzzle on the Model 41 barrel
1. How long are the screws?
2. Are the screws the same length for both parts?
3. What is the thread practice?
4. Are the screw heads slotted, Phillips, or Allen?
5. Is the Smith & Wesson part number 6511?

Thanks to all

Bob