Use extra collars to allow the use of one BMD® across multiple firearms. - A2 Adapter Collars work ONLY with the following non pinned & welded LANTAC Dragon™ Muzzle Brakes: - DGN556B (5.56/223) - DGN9MMB (9mm 1/2x36) - DGN9MMC (9mm MPX) - DGN9MMD (9mm 1/2x28) - DGNAK47B (AK47) - Comes with appropriate crush washers. - Collars are to be used in combination with the BMD®. - Made in the USA.

LANTAC E-BCG® Enhanced Bolt Carrier Group. - 6ARC Variant features special Bolt & Firing Pin. - M16 Full Auto Style for increased mass and lock time. - Our BCG is precision machined from 8620 steel with a shot peened bolt manufactured from Carpenter 158 or 9310 and Magnetically Particle Inspected. - The entire carrier assembly is QPQ (Quench Polish Quench) Nitride coated Black this is a specialized type of Nitrocarbrizing Case Hardening that creates a very hard smooth surface with increased corrosion resistance and low coefficient of friction. - The carrier’s patented and patent pending design features unique shrouded and forward facing gas ports that have also been resized so that gas is vented differently to a standard carrier. This results in a system that runs flatter with a smoother energy pulse and a softer start to carrier movement. - 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 lock position within the upper and makes it more consistent resulting in an accuracy improvement. All critical dimensions are hard turned / ground after heat treat and the gas key has been hard chrome lined for the best possible wear resistance. - All E-BCG’s® feature the LANTAC CP-R360 patent pending domed head 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 11.7oz weight helps to increase lock time and smoother operation. Gas keys are fitted with gasket sealer & 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. - Weight 11.7oz - Full Auto & Semi-Auto Compatible - Forward Porting enlarged vents. - Balanced flared boss. - 8620 Carrier Heat Treated Hard Turned & Ground. - MPI Carpenter 158 or 9310 Bolt Shot Peened Hard Turned / Ground. - QPQ Nitride Coating - CP-R360 Domed Cam Pin - Mil-Spec Gas Rings - Mil-Spec Staked Gas Key - Grade 8 Hardened Fasteners - All Hard Chrome surfaces are to MIL-STD-171 1.2.2.2 - Shot Peening is conducted with S110 shot Established by Almen Gage A-2 strip .006 -.008 - Lifetime Warranty. - Patented - Made in the USA.

Lantac UFA-S Ultimate Forward Assist (Solid). - The UFA-S is precision swiss lathe turned & manufactured from certified 4140 Cr-Mo steel giving improvements to strength corrosion resistance and durability over the original materials. - Parts are all heat treated to 48-52 Rc (Rockwell C). - In addition all parts are QPQ (Quench Polish Quench) Nitrided for improved corrosion resistance and enhanced lifespan. - The main Plunger spring is manufactured with the improvement of Stainless 316 music wire (as per ASTM A313) for enhanced corrosion resistance. - Closed end coils are also used rather than the original open ends for improved seating and alignment. Springs are stress relieved and air cooled. - The Plunger Detent Spring is improved and manufactured from Zinc plated music wire (as per ASTM A288) for enhanced corrosion resistance. - Springs are all stress relieved as per the mil specification. - The assembly is retained within the upper receiver with an improved spiral design pin as opposed to a slotted version for increased strength and durability. Pins are fully certified by the manufacturer. - The design of the Cap has been improved by reducing its diameter and snagging potential creating a more streamline surface flow when assembled into the upper receiver. - Exterior surface knurling around the caps edge allows for positive engagement with a gloved or naked hand while removing the circular ridge that exists on the current design. - Weight of the assembly has also been improved to 20.227g (.7135oz) from 22.481g (.7930oz). - All outer details are bead blasted to create a satin reduced reflectivity surface prior to finishing. - Manufactured in the USA from USA sourced materials and finishes.