IWC Light Mount Torque PSA

[Unobtanium]

IWC has changed the torque spec for their mount, although I can detect no physical difference. The former spec was 40 in lb max. The new spec is 10. I personally torque to 30, using loctite 243. This is my experience and opinion only, and I am not affiliated with any company listed. My preference has been 20 in lb on the light to IWC juncture,  and 30 on the mount itself. Loctite 243 on both. I believe 10 in lb to be too low.

 

[Unobtanium]

Earl Pittman of IWC has responded to my inquiry regarding this change, as follows:

Quote

See instructions #9, a gap is required between halves to allow for the variety of barrel lug diameters Benelli is making in production. 10 maintains enough clamping force.

Edited May 17, 2022 by Unobtanium

[SnidelyWhiplash]

The gap has always bothered my OCD and I’ve adjusted and readjusted to eliminate it or, on one M4, minimize it as much as possible. I’m with you, I’m not sure I’m comfortable with only 10 inch pounds even with loctite.