Just got my Surefire X300U-B new enhanced model in the mail and so far I'm liking it a lot. It now features 600 lumens with 1.75 hours of "useful" runtime.
(Original on the top/left; enhanced model on the bottom/right)

Surefire has made several external enhancements with the biggest one being the new mounting system. It now features the same mounting system as the X400 and fixes what I feel like was the only shortcoming with the X300 series. It is now much easier to swap out the Universal and Picatinny rail adapters and, if like the X400, won't loosen up after lots of shooting as I have experienced.

The contour on the bottom of the body as it meets the back of the bezel is now much more pronounced:

The activation rocker switch on both sides is now a hair shorter and fatter which helps ease manipulation:

On the scale, the original Ultra came in at 4.10 oz. whereas the new enhanced model weighs 4.30 oz.

Brandon
(Original on the top/left; enhanced model on the bottom/right)

Surefire has made several external enhancements with the biggest one being the new mounting system. It now features the same mounting system as the X400 and fixes what I feel like was the only shortcoming with the X300 series. It is now much easier to swap out the Universal and Picatinny rail adapters and, if like the X400, won't loosen up after lots of shooting as I have experienced.

The contour on the bottom of the body as it meets the back of the bezel is now much more pronounced:

The activation rocker switch on both sides is now a hair shorter and fatter which helps ease manipulation:

On the scale, the original Ultra came in at 4.10 oz. whereas the new enhanced model weighs 4.30 oz.

Brandon
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