lip length for Schlage mortise lock strikes

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The L-Series standard strike is the 10-072 and the available lip lengths are listed below.  7/8"  (Flat or straight lip) 1" 1 3/16" (Standard for 1 3/4" doors)  1 1/2" 1 3/4" 2" over 2" up...
The 5100 electric strikes are for use with cylindrical locks only.  Instead use the following:6211 electric strike is used with mortise lock without deadbolt on a new single door, hollow ...
There are two flat lip strike options: Specify XQ02-309 for a 10-013 strike - specify 7/8" Specify XQ07-351 for a 10-025 strike - specify 7/8"
Lip length refers to the dimension from the centerline of the strike screw holes to the edge of the lip.  See the attached as lip length depends on door handing and thickness, Extended Lip Str...
Typically for a 1-3/4" door you would use a 1-1/4" cylinder.  Use the Table in the Pricebook for a reference:  
No parts are compatible between the Falcon MA-Series and the obsolete Falcon M-Series.