Amazing! -- You put an incredible amount of detail into your art, in general I'm not a huge fan of 'muscle girls' but I love your work because of the incredible amount of detail you put into it especially on the close up shots where you've got the texture of the skin and the shine right down to the smallest detail.
But if I may provide a bit of constructive criticism (feel free to ignore it of course). You put all that work into the detail-- and the character in this image is no exception but the gun-- it's missing that same attention to detail as far as it's texture-- it looks almost plastic it needs the fine grain black gunmetal texture-- I know this isn't easy and normally it wouldn't really be obvious except again since you do such a great job with texture everywhere else and that makes it stand out. Again maybe it's just my eyes and I'm certainly no expert but my humble thoughts.
I know you generally do the muscle girl but I know I would love to see what you could do for texture on something-- a bit more curvy especially since you have an excellent eye for the light and shine on the muscles I bet you could do an amazing job with a sports illustrated model as your subject.