The lock panels could use a bit of work: the lock side panel is uneven and points above the centerline of the wrist, while the other side tapers down a little bit too quickly. I would also lower the tail of the cheekpiece side panel just a bit for better visual flow. I also find the sideplate, particularly the very front, a little awkward due to the fact that the front lock-bolt is noticeably off center and has a bit of the plate out in front - next time I'd try to keep the bolt head more centered and possibly do away with that little bit of plate sticking out in front of it. I also concur with Dave regarding the lock size.
On the plus side, the overall proportions are good.