what bore size is a standard ul barrel back on a nt?
kamikaze_chris "DODDSY" Dec 3, 2008 323 16 38 Jun 4, 2010 #1 what bore size is a standard ul barrel back on a nt?
blebit Active Member May 25, 2003 108 2 28 London Visit site Jun 4, 2010 #2 If there isn't any size stamped on it then .688
