RIFLE BUILDER GUIDE 1.) BARREL – All barrels are 1:8 twist. – .223 barrels have a 1/2″ x 28tpi thread – .300 BLK barrels have a 5/8″ x 24tpi thread – .223 WYLDE has the same chamber angling as the standard 5.56 chamber so there’s no problem with pressure. It has a .2240 free bore … Continue reading F.A.Q