Fathom Arms Enhanced BCG
*Includes FATHOM 3D patch for a limited time*
Carrier Material: Case Hardened 8620 Steel
Finish: Black Nitride. This advanced low friction coating minimizes the need for lubricants.
Radiused Gas Key: 4130 Steel, attached with Grade 8 hardware, torqued to correct specifications, and then properly staked into a milled “valley” using a press stake to properly deform the metal. This procedure ensure proper positioning and gas key locking.
Ejection Port: Area is milled with added material for more strength and rigidity
Cam Pin: Hardened 4340 cam pin
Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated
Carrier fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm, .300BLK, 6.8SPC
Laser Engraved Fathom Arms “FATHOM” logo
Bolt Assembly: The Bolt Assembly is machined from solid round stock to TRUE Mil-Spec dimensions. The entire external surface, including the bolt bearing surfaces, is CNC ground after heat treatment to ensure proper and unaltered tolerances.
Material: Case Hardened 9310 Steel, Shot Peened
Finish: Black Nitride coated
Extractor: 4340 Steel, Magnesium Phosphate coated, Mil-Spec Extractor Spring, O-Ring, and Black Extractor Spring Rubber Insert, Shot Peened
MPI: Magnetic Particle Inspected
HPT: High Pressure Test
Bolts are lot tested under MIL-STD-1816 for both HPT and MPI
Proudly made in the USA