I dunno, ejecting the round in the barrel on that G3 set was a nice touch. Of course, the smart thing to do would have been to leave the round in the barrel so you can fire it at someone in an emergency during a reload if needed. I think GRAW had that ability.
As for BM’s weapons, the only real beef I have is with the MP5. The ghost ring sight at the front lacks the middle post to aim with if Gordon ever bothered to use the sights. Admittedly this is probably to maintain consistency with the model in the original HL (because it, too, lacked that post) but from a visuals standpoint it’s inconsistent and a rather perplexing omission. Both pistols have the irons intact, and the Magnum’s are usable to boot, so why not?
Also, when reloading, the bolt closes by itself. I would have rigged the hand to do an ‘HK Slap’ on the bolt to synch up with that. I’m guessing the self closing bolt is probably a result of an animation like that being cut because it wasn’t fast enough, much like the reload for the M203.