ASG Olsztyn takes a look at the Mancraft M4 CNC Receiver and what parts are compatible with it. The M4 body is a high-quality product that uses the same 7075 T6 aluminium alloy as aerospace and aircraft industries. This material has an ultimate tensile strength of 570mpa, which means it can withstand a lot of force without breaking. The body is shaped by precision CNC machines that ensure a perfect fit and function. After the machining process, the body is sandblasted and anodized for a smooth and durable finish. The upper receiver handguard thread and the lower receiver stock mount are compatible with TM standard parts. Alternatively, the stock mount can be removed and replaced with a military type stock that has a 1 - 3/16 - 16" thread.