I just purchased myself one of these -- the titanium model.

http://www.hammerheadrifletool.com/H.../Products.html

I have a Bushmaster AR-15 Combination Armorer's Wrench and although it's very well made (has not broken on me yet), the HammerHead Rifle-Tool is even better.

I know quite a few folks here have spent money over and over replacing cheap, broken wrenches so hopefully, you will find this useful.