If the Duchamp urinal is art, then anything is. But there has to be consensus about good art among informed people -- artists, dealers, curators, collectors. Somebody has to be the first to say something is good, but if you put it up the flagpole and nobody salutes it, then there's nothing there. WILLIAM RUBIN
Conventional eight groove rifling on the left, and octagonal rifling on the right. Polygonal rifling /pÉËlÉªÉ¡ÉnÉl/ is a type of gun barrel rifling where the traditional lands and grooves are replaced by hills and valleys in a rounded polygonal pattern, usually taking the form of a hexagon or octagon.n the Glock pistol, for instance, octagonal rifling is used in the large diameter .45 ACP bore, which has an 11.23 mm (0.442 in) diameter, since it resembles a circle more closely than the hexagonal rifling used in smaller diameter bores.
In conventional rifling, the lands and grooves are cut into the barrel with a sharp transition between them. Typically, this is done using a tool to remove material from inside the barrel.rolonged barrel life. Polygonal rifling is universally accepted, precision pistols, such as used in bull's-eye and IHMSA completion almost universally use traditional cut rifling because of the stresses of manufacture mentioned before.