If these are off by 0.2mm, the slide will bind or the magazine will drop out.
The Glock platform is uniquely suited for 3D printing experimentation. Unlike the AR-15, which requires metal milling, Glock rails can be printed using high-strength polymers like Nylon or Carbon Fiber reinforced Nylon. Famous designs within the "Deterrence Dispensed" and "Defense Distributed" communities have utilized Glock CAD files to create functional frames that accept standard Glock parts. glock cad files