Specifications

TM 05539-IN
MUZZLE BREAK MAINTENANCE - CONTINUED 0017 00
0017 00-4
INSTALLATION - CONTINUED
6. Remove muzzle break (1) after proper alignment has been achieved. Use care to not lose shims.
7. Remove the barrel (3) from the vise or fixture.
8. Clean and degrease the threads (6) and contact area (7) of the barrel with acetone.
9. Clean the internal threads of the muzzle break with a cotton swab and acetone.
10. Prefit muzzle break to determine correct shim (4) needed for final installation using timing wheel procedure. See Timing
Wheel Instructions in this work package.
NOTE
Do not apply thread sealant between or behind shims.
11. Apply a thin coat of thread sealant (Rocksett®) to any exposed surface (8) on the barrel (3) that is covered by the muzzle
break.
12. Apply a thin coat of thread sealant (Rocksett®) to the threads (6) of the barrel (3).
13. Apply a thin coat of thread sealant (Rocksett®) to the internal portion of the muzzle break.
14. With the barrel (3) pointing up (vertical), install the correct shims (4) on the barrel. Ensure the shims are centered on the
barrel and install to muzzle break over the shims onto the barrel.
15. Secure the barrel (3) in a vise or fixture.
M40-090
1