American Precision Arms Gen4 Little Bastard Self-Timing

Compact version of Fat Bastard. 1.0" diameter, 3.3" approx length, 4.2 oz (Gen2). Barrel diameter .75–1.0". For 30 cal and smaller — 6mm, 6.5mm. Self-timing nut, no shims needed. Made in Georgia, USA. Gen4 uses optimized port design from Fat Bastard lineage.