An interesting group of 1911 pistol modifications.
The work is being done by D&L Sports.
Notice the relief cuts on the top and sides of the frame rails where the sand and grit are able to "get out the way" of proper slide function.
That makes lots of sense to me.
The cuts into the side faces of the trigger and the serrations on the barrel hood should help also.
An innovative set of modifications to help battle harden a pistol carried in a nasty, dirty, environment.
I would probably finish it off with internal and external Electroless Nickel.
Link To The D&L Sports Web Site. They do really neat, nice custom work.
Sand Cuts in Frame and Slide