Modified Benelli M2 Super 90 Shotgun with pistol grip stock, extended magazine tube, rifle sights; modified for the movie to use box or drum magazines, used by the "Slag" robbers at the beginning of the movie.
I don't know who changed this, but its and M2, not an M1. Note the shape of the bolt handle. -Gunmaster45
The 2nd Slag gunman at the beginning of the film discards his Remington 870 short shotgun and uses a Ruger AC556 with an aftermarket synthetic pistol grip stock. Later he throws down the AC556 from his perch on a L.A. Billboard. It is replaced with a rubber casting of the weapon at this point.
Upset over the death of his human partner, Det. Sgt. Matthew Sykes (James Caan) trades out his Beretta 92FS and picks up a Freedom Arms Model 83 Revolver chambered in .454 Casull. The Model 83 appears to be the premiere grade. Freedom arms offers two grades of the Model 83 (and the shorter barreled Model 97). The Field grade has a matte stainless finish, the Premiere grade has a high polish stainless finish.
Error creating thumbnail: File missingFreedom Arms Model 83 - .454 Casull MagnumError creating thumbnail: File missingChecking out the Freedom Arms Model 83 Revolver (.454 Casull) with the range masterError creating thumbnail: File missingSykes aims the Freedom Arms Model 83 Revolver (.454 Casull) at the range - .454 CasullError creating thumbnail: File missingThe business end Freedom Arms Model 83 Revolver (.454 Casull)Error creating thumbnail: File missingFrancisco is understandably unhappy when Sykes tries to fire a Freedom Arms Model 83 Revolver (.454 Casull) out the passenger window, right in front of his face....Error creating thumbnail: File missingThe effect of the 454 Casull is seen on the vest. Normally a revolver round would still not penetrate a vest, even a high powered one, unless it was a hardened metal spitzer round (like the semiautomatic only FN 5.7 round). Additionally it would not blow a huge hole in the vest like an overstuff down pillow either.
Remington 870 Shotgun
A full sized Remington 870 police shotgun is used by Det. George Francisco (Mandy Patinkin) when he is pursuing the mutated slag monster. Also a short barreled Remington 870 with a synthetic black pistol grip (with no stock) is used by the 2nd Newcomer robber at the beginning of the film.
Carried by Rudyard Kipling (Kevyn Major Howard), better known as Rafterman in the film Full Metal Jacket. Kevyn retired from acting in 1999 and is a successful (and talented) photographer working in Los Angeles.
A female police officer at the Police Target range is seen using a standard Smith & Wesson Model 10. It is not unrealistic for a woman officer (in the 1980s) to choose a smaller caliber round than her male counterparts.
Error creating thumbnail: File missingSmith & Wesson Model 28 Revolver, called the Highway Patrolman - .357 magnum. This model can be seen with several different styles of wooden grips.Error creating thumbnail: File missingThe LAPD Officers in uniform all carry what seems to be Smith & Wesson Model 28 revolvers - .357 Magnum. The Model 27 was usually used by Feds or Detectives due to its higher cost. The Model 28 was the economy version of the Model 27 and was widely used by rank and file law enforcement.
Unknown Snub Nose Revolver
Detective Francisco (Mandy Patinkin) pulls out his backup revolver, but it is too dark to determine what it is.