Always use a calibrated torque wrench, and choose thread compound by barrel material. Never use a crush washer on a silencer mount; use a direct shoulder or flat shims.
| Part | Barrel or silencer | Torque | Compound |
|---|---|---|---|
| Muzzle device, 1/2-28 | Nitrided 4140 barrel | 15-20 ft-lb | Rocksett |
| Muzzle device, 5/8-24 | Nitrided 4140 barrel | 20-28 ft-lb | Rocksett |
| Muzzle device, 1/2-28 | Raw 416 stainless barrel | 15-22 ft-lb | Nickel anti-seize |
| Muzzle device, 5/8-24 | Raw 416 stainless barrel | 22-30 ft-lb | Nickel anti-seize |
| 1/2-28 to 5/8-24 adapter (barrel side) | Same as a 1/2-28 muzzle device | 15-20 or 15-22 ft-lb | Per barrel material |
| Rearden Ti DTA or Atlas GEN 2 | 17-4 stainless silencers (Anthem, Torch, DUTY, COMP) | 35-45 ft-lb | Nickel anti-seize, male threads only |
| Rearden Ti DTA or Atlas GEN 2 | Titanium silencers (Mach) | 28-35 ft-lb | Nickel anti-seize, male threads only |
| Front end caps and MBEC | All | 60 in-lb (5 ft-lb) | Nickel anti-seize |
Not sure of your barrel material? Use nickel anti-seize and the raw 416 values.
Rules
- Never mix Rocksett and anti-seize on the same threads.
- Never use Rocksett at the silencer-to-adapter interface.
- Let Rocksett cure at least 1 hour before firing, or heat cure at 300°F for 1 hour.
- Re-check tightness after the first 5 to 10 rounds, once everything has cooled.
- Direct thread silencers go on hand-tight over nickel anti-seize.
- Always confirm alignment with a bore alignment rod before firing.
Full details are in the LPM Master Installation Manual.
1/2-28 vs 5/8-24: A Thread Pitch Guide
13.7" vs 14.5" Pin and Weld: Which Eclipse Do You Need?