For maximum airgun recoil effect, take a look at the Umarex copy of the Beretta PX4.
It's a CO2 powered .177 pellet pistol, with a rifled barrel and blowback action, that shoots about like a .22 at respectable distances.
Quite accurate and realistic.
Walt Kelly, alias Pogo, sez:
“Don't take life so serious, son, it ain't nohow permanent.”