He's talking about R4Ms, which had quite a bit less drag then the WGr's. They also raped buff formations. In one of the few properly conducted missions for the Me-262, around 20-30 262's upped to intercept a B-17 formation. All were armed with the 24 rocket R4M racks. They lined up behind them at around 700-1000m, and opened up. The buffs were slaughtered.
Personally, I'd love to have R4M's. But they wouldn't be used often, seeing as they were mostly used on the already elusive jet, but I'm fairly sure that the 190 had a setup for them.