Lantac QPQ Nitride Enhanced E-BCG Full Auto Style (.308/7.62) Bolt Carrier Group
AR10 Full Auto Style for increased mass and lock time. Our DPMS Style Pattern 308 EBCG is precision machined from 8620 Steel with a 9310 Precision Hard Ground Bolt. The entire carrier assembly is QPQ (Quench Polish Quench) Nitride coated Black, this is a specialized type of Nitrocarbrising Case Hardening that creates a very hard, smooth surface with increased corrosion resistance and low coefficient of friction. The carriers patent pending design features unique shrouded and forward facing gas ports that have also been re sized so that gas is vented differently to a standard carrier. This results in a system that runs flatter with a smoother energy pulse.
In addition the system also runs cooler and cleaner, there is also less pressurization of the upper receiver when running a suppressed barrel. The flared boss at the tail of the carrier enhances the BCG's position within the buffer tube at the time of cycling and allows for a flatter more controlled reciprocation of the assembly. All critical dimensions are hard turned / ground after heat treat. All E-BCG's® feature the LANTAC CP-R360-H™ patent pending domed cam pin that is machined from 17-4PH Stainless Steel and hardened to H900 condition (45RC approx). The ultra smooth head reduces wear within the upper receiver.
The BCG's weight helps to increase lock time with smoother operation. Gas keys are properly staked at four points and only grade 8 fasteners are used in assembly. The E-BCG's® forward porting and unique shape assist in reducing pressurization inside the upper receiver that can be caused by short barrel rifles running suppressors. However, it should be noted that the E-BCG® is not a complete solution for this issue and all rifles are different. 'Over Gassed' guns will suffer to a larger extent from this problem.