Consider the XPS series. It solves the design problem with the position of the battery. Your front sight won't be too much of an issue in practice. If it really bothers you it can be cheaply replaced or removed later.
Assumption is the mother of all ****ups.
Know what you know, Know what you don't know. -Paul Pedzolt
"Jack of all trades, master of none, though oftentimes better than master of one" -Mynshul