I just got a Lumley carbon fibet bolt handle in the mail. First of all it is very light, it is a similar design to Badger bolt knob and is about 1/2" longer than the factory round target handle/knob . It is very light (Ultra Light) and looks really nice. I do not know how durable this will be as the handle is adfixed to the bolt housing by alumium bolt. I also have a Extream Hard Core Gear bolt knob on it's way as it looks to be super tuff (Unbreakable). Now for my tale of the day I had a great day at the Sac Shooting center 3/8" group out of my Model !0 custom 308, 185 VLD's. Now if I can figure how to post pics from my Ipad that would be awsome.