This is a Ping graphite shaft that was sold with the ISI model Ping Irons in the nineties.

The w54 was a firm stiffness-not regular-but it was very light weight shaft at that time.

You can replace that shaft with any on the market. Since that shaft came with the Ping ISI Irons and had a firm flex, since the W44 were regular, you should get a stiff shaft put in for a replacement.

The W54 nuclear warhead used in the Davy Crocket, AIM-26 Falcon air-to-air missile and the SADM atomic demolition munition was a variable yield, linear implosion warhead most likely with an unreflected bare ovoid pit.

It boasted a variable yield of 0.01 kilotons (10 tons of TNT) or a variable yield variant of between 0.02 kilotons-1 kiloton. (20 tons of TNT - 1000 tons of TNT)

The cost to develop this weapon is not that easy to find, but many estimates and research have shown a price of anywhere from 14 - 40 million per weapon, not including the delivery system.