Post by 8ace
Hi,
It will depend on what you consider "realistic"
Markings
Weight
Material used
PFC Firing - non firing
Colour
Some of the dummy round gun are very realistic (Hudson M1 Garand, Marushin Luger, Hobbyfix Colt)
Most pistols are made from HW/ABS plastic which might not "feel" right but look fantastic with stamps and markings
The Marushin M16 is a nice model and can be got very cheaply.
8ace