>implying an early thompson can group like that in burst from 50+
Funny thing, in the show they portrayed Guarnere as easily hitting his mark and Lorraine repeatedly missing his. In reality Guarnere missed initially and Lorraine was on target.
Source: Brothers in Battle, Best of Friends by William Guarnere and Edward Heffron, ISBN: 978-0425224366
Also, that’s an M1A1. The later service variant.