The following guns were used in the film Risky Business:
Smith & Wesson Model 60
MGC Replica M16 rifle
In Joel's dream sequence, both SWAT officers and National Guard troops are seen carrying MGC M16 Replica rifle as they surround his house.
Browning M2HB Heavy Machine Gun
What appears to be a Browning M2HB heavy machine gun is mounted on National Guard half-track in Joel's dream sequence.
Also briefly seen in the dream sequence is a Remington 700 rifle held by a SWAT sniper.