Additionally an index pin on the bottom of the handle prevents rotation of the arm and works with the screw to form an extremely robust assembly. Mounting of the side charging arm is achieved with the use of a 1/4 X 28 Tpi, Grade 8 fastener and a recessed mounting slot is machined into the carrier that offers a flat and secure surface. This gives the shooter up to six different handle configuration options to choose from, at no additional cost.
The carriers alignment guide is lightened and the tail of the carrier is flared for improved concentricity and alignment within the upper receiver, this in turn improves accuracy and has been independently tested and confirmed by the US DoD.Ĭharging handles can be swapped out at will and together with three grip styles a short handle base is also included. The port aligns perfectly with a lubrication reservoir on the tail of the bolt, allowing the user to lubricate the mechanism without having to disassemble the rifle system. A lubrication port is machined into the side of the carrier so that oil or grease can be applied with the carrier and bolt in battery. The Straight Pull E-BCG® has been completely redesigned from a standard BCG and features a dedicated carrier intended for use solely in Straight Pull ARs. Straight Pull shooters can rest assured our parts are of the highest quality and reliability.
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Radiography & Microscope analysis that revealed only minor surface crack initiation to the lugs, while standard M4 bolts usually fail at circa 12,000 rounds with crack initiation and propagation causing the lug to fail on either side of the extractor recess. Semi Auto 65,000 round count bolts have undergone MPI (Magnetic Particle Inspection), Lantac's BCG's have undergone Defense Standards (DEFSTAN 00-035) 72hr Salt Fog trials and surpassed the requirement with minimum corrosion evident on both the carrier & bolt, as compared to the standard MIL-DTL-16232G Manganese Phosphated BCG's. It is S110 shot peened and 15N Rockwell heat treated to 89-90.5 hardness.Īll bolts are MPI (Magnetic Particle Inspected) for defects prior to coating and all parts are QPQ (Quench Polish Quench) Nitrided to AMS2753B standards, for improved corrosion resistance and lifespan. The E-BCG® features a Carpenter 158 Bolt that again is hard turned after treatment. Critical diameters are hard turned/ ground so that perfect dimensions are maintained. The carrier is precision machined from 8620 steel that is heat treated to a 15N Rockwell hardness of 89.5-91.0. Lantac's Straight Pull E-BCG® (Enhanced Bolt Carrier Group) is a patented design that uses completely milspec, tried and tested quality materials.
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