Any Pistol, Any Size, Any Light & Optic Combo, M.A.R.S. "iWB" carries them all with an absolute minimal profile. More Pistol and less plastic down your pants!
 
Based on the popular MARS "Lo Pro" Carry insert, the Magnetic Adaptable Retention System (M.A.R.S.) (patent pending) brings strong, dependable retention, trigger guard protection, and a smooth draw stroke to nearly any modern pistol in an ultra minimal package. If you have a steel slide, you are good to go! Works with all lights and optics, including aftermarket extended switches and slide stops. This "iWB" version now offers a dedicated in-the-waistband carry option for our long-proven MARS system. 
 
Specifications:
Magnetic Adaptable Retention System (M.A.R.S.) (patent pending)
High-Quality (licensed) neodymium magnets 
Full Grain Veg Tan Leather Construction
Beveled and Internally Reinforced for comfort and durability
Low Profile Design
Right and Left Hand Specific Geometry (NOT ambidextrous like the MARS Lo-Pro) 
Includes Ulticlip-XL Belt Clip that fits Belts up to 1.5" wide
 
Made in Utah, USA
 
Add a Wing:
Crux Concealment Wing (+$14.99) - a fully customizable concealment system that applies additional leverage by rotating the holster and the grip of the gun towards the user’s body, creating better concealment and less “printing” of the firearm. The Crux can be mounted for both right or left-handed carry. Its modular design allows each user to customize it to fit their need for concealment, and comes with all the hardware including longer screws to remount the belt clip.