As the SEALs are preparing for their drop, they very clearly all arm with AK-47s. This is presumably so that any shell casings, bullet holes and/or weapons they leave behind will not be identifiable as American--fairly standard practice for black ops. However, in the first firefight, Lt. James is clearly shown firing an MP-5, which is used almost exclusively by western NATO nations. Later on at the missile complex (after his capture and escape), he is seen once again carrying the MP-5, which he wouldn't have since it would have been taken away from him at his capture. The MP-5 suddenly disappears so that he can use a silenced hand gun. Which then, for some unexplained reason, loses it's silencer in all the scenes after that.