VORTEX DEFENDER CCW TAN 3MOA

M3x0.5 (9.8MM) Sig Sauer® P365XL M4x0.7 (11MM)
Canik® TP9SFX/TP9SC
Sig Sauer® P320 M17/M18/RXP CZ P10® Series M4x0.7 (9.8MM)
Glock® MOS
Ruger® 57
Springfield Hellcat® Series 6-40 (9.8MM)
FN-509® Series 6-48 (9.03MM)
H&K® VP9 Tactical OR Kimber
AEGIX/KHX Custom 6-32 (10.8MM)
Smith and Wesson® M&P 2.0

The defender ccw was designed for narrow slide, concealed carry handguns that come so the optic can be direct mounted without the use of a plate. The shield rms-c has become essentially a standard footprint for those types of pistols, so no adapter plate is needed.

On "full size" handguns, there are still a variety of footprints on the market for dots, so adapters plates are typically needed and so the plate is added as a standard spare part for the ST