Make sure to also checkout my full Table Top Review where you will find more details and specifications for the KWC Luger P-08 Airsoft replica pistol which is virtually the same gun as the 4.5mm BB version with the only real difference being the ammo type and the amount of rounds per magazine (21 rounds for the 4.5mm BB version and 15 rounds for the 6mm Airsoft version).
I have also already made a full Field Test Shooting Review for the Airsoft version of this CO2 Blowback Pistol where I got very similar results using slightly heavier .25 gram Airsoft BB's so again, make sure to checkout that YouTube Video Filed Test Review.
Basically in this YouTube video, I shoot the 4.5mm Steel BB version of the KWC P-08 Luger head to head against the Airsoft Version to see how they compare in terms of Feet Per Second speed and Accuracy from30 feet away from a paper target using a semi rested shooting stance. As expected the heavier 4.5mm Steel BB's shot a bit slower but did seem to have a slight advantage in the accuracy department.
Watch my YouTube Field Test Head to Head Shooting video of the KWC Luger P-08 CO2 Blowback Replica Pistols to see how they both compared: