You must be logged in and verified to contact the designer.
Built for a 4" long feed-slot on a DM450 spar from Dwyer Mast .
Custom lengths can be requested at info@MastGates.com
The oblong hole in the base of the insert was added to prevent sliding of the insert when slugs rub on it during the passage.
With the insert centered within the feed slot, look into the track and use something to mark the center location of the oblong hole.
Remove the insert to center punch the location with a nail. Drill & tap for small nylon or stainless allen set screw.
BUILD ITERATION: DM450 pg465A 102mm OK (June,5,2020)