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Lantac Enhanced BCG Full Auto Style (.308/7.62) NiB UCT EXO


An AR-10 full auto style bolt carrier group for increased mass and lock time. The Enhanced .308 Bolt Carrier Group is precision machined from 8620 Steel with a 9310 precision hard ground bolt.

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Our DPMS Style 308 BCG is precision machined from 8620 Steel with a Carpenter 158 or 9310 Precision Hard Ground Bolt. The entire carrier assembly is NiB, Electroless Nickel Boron coated with the patented, advanced UCT EXO process, unlike standard NiB coatings. This offers extreme lubricity with a friction coefficient of .02 and surface hardness of 82-85 Rockwell C. 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.


  • DPMS pattern
  • NiB UCT EXO coating
  • Heat treated 8620 steel carrier
  • Hard turned 9310 steel bolt
  • Bolt magnetic particle inspected
  • CP-R360 domed cam pin
  • Forward porting with enlarged vents
  • Balanced flared boss
  • MIL-SPEC gas rings
  • MIL-SPEC staked gas key
  • Grade 8 hardened fasteners
  • MIL-SPEC chrome lined carrier bore and gas key
  • Lifetime warranty
  • Weight: 1 lb 2.1 oz
  • Made in the U.S.A.

The included Domed Cam Pin is machined from 17-4 PH stainless steel, hardened to H900, polished, and finished in its natural hardened coppery state. The circular head has a flat face machined so that it may be inserted into any bolt carrier without removing the gas key. Two further flats are machined at 90 degrees to the front face, minimizing internal wear to the cam channel.

LANTAC USA manufactures the highest quality accessories for AR-15/M16 pattern rifles. Precision made in the U.S.A., rifles, muzzle brakes and more.

Made in the USA.

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