A few weeks ago on the Borelli Consulting discussion board, a question was asked about the pros and cons of piston-operated semi-automatic rifles versus gas-operated semi-auto rifles. At that point in ...

Engineers have a lot to think about when designing new engines, and one of the biggest considerations is the shape of the ...

A new technology called Digital Piston Motion Control eliminates the crankshaft of a conventional engine and controls the piston movement using an ECU. To understand more about this novel approach and ...

Here’s What You Need To Remember: The PKM is sometimes described as “an AK flipped upside down and made in a different caliber,” which is not totally incorrect. Both weapons use the long-stroke gas ...