Keltec PR57 vs. SW 351 PD vs. Brownell 180 vs. BRN 180: A Comparison For quite a few years , enthusiasts ’ve sought unique submachine guns , and certain emerge as especially compelling options . This discussion contrasts four iconic models: the Keltec PR57, the Springfield Armory SW 351 PD, the Brownell 180, and the BRN 180. These devi… Read More