A BETTER BOLT CARRIER ASSEMBLY
Daniel Defense redesigned the geometry of the bolt carrier group, made the cam pin larger and improved the cam pin path in the carrier to ensure smooth, reliable feeding. The bolt is machined from extra-hard 9310 VIM-VAR steel and is covered with a proprietary low-friction, corrosion-resistant coating for added protection and smooth operation. It also makes the whole thing much easier to clean (which I fortunately never had to: The Daniel Defense crew took full care of maintaining the weapons). The front of the bolt features twin ejectors for better feeding and extraction. In addition, a bigger, stronger spring than found in a typical AR-10 is used to power the extractor.
The ambidextrous charging handle doesn’t have a traditional catch that engages the upper receiver; it relies instead on a ball-bearing detent that takes less space. The handle is considered “modular” and