That is a standard WGP bolt, the back block however is a chromed after market item. The stock back blocks do not have a cut-out notch, they are normally one continuous angle (top to bottom).
No wrap on the ram, just no anno...was stripped off. I believe that is an older KAPP ram, works great.
Below is a pic of a stock WGP Clippard ram (top) and an after market A.N.S. mini ram.
Here's some more detail...
Stock WGP items: 3-way, HPR, LPR, valve, bolt, hammer
After market items: Ram, back block, cocking rod, lp hoses, springs
Mod: polished lug & sear