Because Headcase, I bought a Fisher AG-7 "spacepen" and a 400G Bullet Pen.
I have not actually used either *much* seeing as how I only received them a few days ago, but here are some quick first impressions.
I realllllly wanted to like the AG-7, but I'm finding it too lacking. I'm not a big fan of the balance of this pen. The center of gravity is a bit closer to the clicker than the tip than I'm comfy with, and I'm not really a fan. I think I am just used to neutrally balanced or tip weighted pens and this just feels weird. The grip of the pen is also thinner than I like. I guess with no gravity pulling the pen around it might not matter. It is heavier than the 849 I have gotten used to, but still lighter than a Rotring although both have better subjective balance than this. The clicker definitely has some metal on metal contact, and scrapes as it goes down but seats with a very positive click. The button release is pretty neat. Ignoring the scraping clicker, the fit and finish of this pen actually feels quite good. It is all metal, and will probably outlast me.
I also got the 400G Lacquered Brass bullet pen.
I was not sure how I would like the bullet pen, but I must admit it is growing on me quickly. I had previously used HALF of a bullet pen - with no idea what to do with the cap. Whoda known, but with the cap on the back of the pen, it handles like any other full sized pen! The balance is biased towards the tip of the pen, which I like and the weight is nice. Like the AG7, this pen is on the slim side for my tastes, but I see it as a backup for my primary pen, or something to jot quick notes in the car. My only other complaint about this pen is that it tends to sit in the EXACT bottom of my pockets perpendicular to my leg where a full size pen stays more or less straight up & down parallel to my leg. It is probably better suited to being tucked into a wallet, or left in a cup holder in your car which is where mine will live.
Seeing as how I am me, I removed the Lacquer from the pen within 12hours of receiving it. I will not be able to comment on the durability of the lacquer, as about 2 minutes soaking in acetone and another 30seconds with a scouring pad made short work of it... The patina of naked brass, combined with the unusual spiral decoration is giving my modified pen a nice well loved look.