The RetroArms receiver is CNC-machined from a single block of EN AW 7075 T651 aluminum, making it extremely durable even under heavy use, unlike zinc-aluminum cast receivers. Another advantage of a one-piece machined receiver is the precision of the manufacturing process. Considerably more material is used for each part of the receiver, resulting in exceptional strength and longevity. However, this receiver is not compatible with upper or lower parts from other manufacturers.
The top of the upper receiver features a milled RIS rail (MIL-STD-1913). The receiver does not include a charging handle; you can use the original charging handle of the gun or a RetroArms charging handle as an alternative. The pistol grip threads and outer barrel mount follow the Tokyo Marui standard, so any Tokyo Marui standard rail or outer barrel will fit.
The lower receiver is milled from a solid block of EN AW 7075 T651 aluminum and reinforced for maximum durability. RetroArms recommends using their own split gearbox with integrated hop-up chamber or alternatively their standard gearbox model. RetroArms cannot guarantee compatibility of gearboxes from other manufacturers with this lower receiver. The buffer tube attaches via a special adapter, which allows the installation of any Tokyo Marui AEG standard stock or buffer tube.
Package includes: CNC lower receiver, CNC upper receiver, CNC receiver pins, CNC buffer tube adapter, CNC small center receiver pin, CNC forward assist locking pin, dust cover for the ejection port, required screws, flexible pin, dust cover pin, forward assist spring, dust cover spring, and rubber dampening pads for the gearbox.
Installing internal parts and the receiver requires professional knowledge, experience, and skill. RetroArms warranty does not cover damage if the receiver or gearbox breaks due to incompatible parts. Do not use excessive force during installation. Apply only 1 Nm of torque to screws; otherwise, the screw may be damaged.
