https://247wallst.com/special-report/2023/08/14/17-prototype-guns-rejected-by-the-us-military/
https://247wallst.com/special-report/2024/04/11/17-prototype-small-arms-rejected-by-the-us-military/
https://en.wikipedia.org/wiki/XM29_OICW
https://en.wikipedia.org/wiki/Stoner_63
https://www.quora.com/How-good-was-the-Stoner-63-rifle
https://en.wikipedia.org/wiki/XM25_CDTE
https://www.stripes.com/theaters/us/ig-to-army-move-forward-or-scrap-long-delayed-xm25-weapon-program-1.426747
https://en.wikipedia.org/wiki/China_Lake_grenade_launcher
https://en.wikipedia.org/wiki/ARES_FMG
https://www.militaryfactory.com/smallarms/detail.php?smallarms_id=112
https://en.wikipedia.org/wiki/Pancor_Jackhammer
https://www.imfdb.org/wiki/Pancor_Jackhammer
https://www.militaryfactory.com/smallarms/detail.php?smallarms_id=111
https://en.wikipedia.org/wiki/XM307_Advanced_Crew_Served_Weapon
https://www.militaryfactory.com/smallarms/detail.php?smallarms_id=695
https://www.spacewar.com/reports/General_Dynamics_To_Design_Remotely_Operated_Variant_Of_Xm307_Advanced_Crew_Served_Weapon.html
https://en.wikipedia.org/wiki/Barrett_XM109
https://www.militaryfactory.com/smallarms/detail.php?smallarms_id=936
https://nationalinterest.org/blog/reboot/these-five-canceled-army-weapons-systems-cost-30-billion-198421
https://www.military.com/undertheradar/2016/12/7-canceled-weapons-youll-wish-standard-issue
https://gizmodo.com/the-u-s-spent-7-billion-developing-this-helicopter-it-1666807286
https://www.army-technology.com/projects/arh-70a/
https://www.airforce-technology.com/projects/abl/?cf-view
https://jalopnik.com/the-airborne-laser-may-rise-again-but-it-will-look-very-1724892313