I made these leather holsters for my nephews last x-mas.
Step 1: Cut Leather
Cut out leather for the body of the holster.
Step 2: Holes for Lacing
Punch holes for the leather lacing.
Step 3: Stamp Pattern
Stamp a pattern into leather.
Step 4: Dye & Lace
Dye your leather, let it dry. Then lace it up.
Step 5: Cap Gun
Wet mold with cap gun in holster.
Step 6: Repeat
Now just repeat and mass produce.