Last year, I had a good time building an 80 Percent Arms GST-9, not quite GLOCK 19 pistol. That was a fun gun to build, and it has run without a hiccup. Since then, I’ve ordered and built just about everything 80 Percent Arms makes, and a few of those builds have been detailed on TTAG.
When 80 Percent Arms’ announcement of a new version of their pistol frame kit, the GST-9 MOD1, I had zero hesitation in ordering one.