I’ve made no secrets that I am a fan of airsoft. Yes, it has its training limitations but it is an excellent force-on-force substitute for those without access to sim rounds.
RatedRR put put a video showing the differences between an airsoft gun (which fires with about one Joule of energy) versus its “real-steel” cousin a .50 Barret (which fires at 18,000+ Joules). The two “rifles” battle it out seeing who can destroy the other first.
The results are highly entertaining. Incendiary rounds are beautiful in slow motion.