The Sharps Rifle Company is selling a new AR-15 bolt called the Relia-Bolt.  Some of the features the new bolt offers are:

• redesigned lugs to “…virtually eliminate the most common MSR malfunction, the bolt to barrel extension jam.”
• machined from S7 tool steel for increased strength
• NP3 coating
• compatible with all AR-15/M-16 type rifles
• lifetime warranty

However, one reader suggested the bolt could be fragile in very cold temperatures and might even break when used in sub-freezing temperatures.  What do you think?

Thanks to Zack for the tip.