I too have the 581 Barrage, mine is close to yours in production #829,
it seems they may have gotten tired of spitting them out at this point. I'm sure they had a deadline. I sent mine back after I recieved it. Side to side blade play and very slight vertical play, (using the tip of course!). I also was not happy with the fit and finnish of the bolsters to the G10. It was uneven with a larger gap due to the bevel of the bolster on one side and not quite uniform on the other. Again I could have lived with it, and I was acting like someone who paid around $200 dollars for a knife..............Wait A Minute! I DID!!!
So I'll see what I get back When It Comes. I sent it in on the 30th of March.I
I think Benchmades designs and materials are Great, sometimes I think they feel that's all they need to reel someone in. I could have fixed it but there should not have been side to side play on a knife of that cost.
N.T.S.