Don't forget to waive Free return in cart and get an even lower price - Coupon "SPRING15" for 15% off first 3 orders (Max discount/order $30) or Coupon "72LEWBP" for $10 off on your next 3 orders - The Primary Arms Micro Dot with Removable Base GEN II is similar to our MD-FBGII but features a removable, included 1913 Picatinny base. With the base removed, the scope body is compatible with any industry standard Micro mount system. The MD-RBGII features 1,000 hours of battery life from the included CR2032 battery at a medium setting and an ultra-sharp 2 MOA dot. The brightness knob on the right side adjusts 12 brightness settings from night vision compatible to daylight bright. This tough optic is waterproof, with a 1-year warranty. Rubber "bikini" lens cover included.