That was actually feed back given from the US army to the development team at Heckler & Koch.
The rifle evolved form the kinetic energy carbine portion of the doomed XM29/OICW program, and eventually became the G36 rifle. In between those two, however, it was the XM-8, and it came close to adoption by the US military.The XM-8 was designed to be a very modular system, with a variety of interchangeable stocks, handguards, optics and accessories.
Video: [16:54] https://youtu.be/Te2IqFbRR7A?si=
https://www.forgottenweapons.com/hk-xm-8-what-was-it-and-why-with-larry-vickers/
https://www.forgottenweapons.com/almost-adopted-the-hk-xm8-family/
Sometimes somebody says something that just makes so much sense that you can’t argue with it.
We are to the XM8 timeline as Tantalus was to the fruit branch in ancient Greek myth. Always in sight but always out of reach. Truly tragic.