Larry, do not quote me on this, but, I seem to recall old video of tests showing the F16 able to take a 20mm cannon shell to the canopy. Given most any commercial or military today is several inches thick, no using the handy knife today. Or, even a handy goose.

Do you recall the likely apocryphal story of the Brits copying our air cannon to test engines and windscreens using dead chickens? The Brits came back to US designers for help, baffled by the chickens going thru the windscreen, pilot seat, rear cockpit wall, and finally stopping in the engineer's rear panel, and wondering what they were doing wrong. The US team said to describe the process step by step, so they could help figure it out, starting with loading the thawed chicken in the cannon, and the Brits replied, "Thawed, you don't say?"