You don't see these everyday. Franchi SPAS (Sporting Pump Auto Shotgun) 12 with folding stock with the metal "hook" butt stock.
The "Sporting Shotgun" was added to the nomenclature of the shotgun to avoid the notion is was a tactical firearm that was
was prohibited by the 1984 BATF firearm ban; mine shown is one year pre-ban. There are several butt stock variations that were offered, but the metal folding "hook" is the
the desired collectible.
A cult following of the shotgun after being featured in the movie "The Terminator" with Schwartznegger. It took 10 years but I finally cobbled together all the possible accessories for the shotgun. The pump mode was desirable to shoot riot soft rubber rounds. It had a recall for the original lever safety which could fire the round when taking "off" the safety; a factory recall involved cross-bolt safety replace the lever style. One of the interesting "accessories" was a 2-piece "muzzle diverter" that screws on to the end of the threaded barrel and transforms the shot pattern into
a lateral (horizontal) pattern for a higher probability of humanoid target hit; purchased it new from the Spas12.com site for $1300 last year, a few years ago I paused @ $500 bucks, bad idea! in retrospect. This one shown has about one box of shells thru it. I authored a technical manual on the lever v. cross bolt safety mechanisms just for fun. It is a very clumsy shotgun to manipulate and I would never consider picking it up for self-defense.
A little mind-numbing back story on the "muzzle device" historical development.
A variety of shotgun muzzle devices have been tried over the years to enhance their effectiveness in a defensive role. One item that comes off often is "Duck Bill Spreaders" most seem to originate in the early 70's. Crane Lake is often cited as were their origin and cited has being used by the SEAL's in Vietnam and by the Air Force Security Forces.
In each case they are cited as being regulated for use with #4 buck shot. Relative reference manuals from the early 70's reveals #4 buckshot was the preferred load for LE-military shotguns.
Crane Lake is often cited as such prototype muzzle devices used by the SEAL's in Vietnam and the Air Force Security Forces.
A&W muzzle in "The Police Shotgun Manual", by Roger H. Robinson, 1973. Mr. Robinson includes many high speed photos that were provided by A&W Engineering of shot loads coming out of the A&W duck-bill device; photos show the diverter to be very efficient at pattern modification
At 10 yards a 7 1/2" H x 29" W pattern with #4
At 30 yards a 25" H x 96" W pattern with #4.
A claimed a 22% reduction in recoil an diminish the muzzle flash to that of a .38 special at night.
A slug can be used as well, imparting two grooves on either side of the slug with a reduction in projectile yaw.
According to Swearengen in _The World's Fighting Shotguns, the US Air Force Directorate of Security Police in the mid-1960s developed a requirement for a spreader choke that would produce a wide elliptical shot pattern. This horizontal pattern spread was supposed to increase the hit probability from a shotgun on a moving target.
The Air Force request went to Frankford Arsenal for action, at the time Frankford was working on improvements to the military shotgun in general. Early experiments at producing a spreader choke were less than successful- the chokes split, patterned poorly and in various ways failed to produce te desired result. Ultimately Frankford ordnance engineer Charles A Greenwood developed the duckbill choke in answer to the Air Force requirement. It was subjected to a good deal of laboratory and field testing.
The original duckbill choke was simply a sleeve with a long V-notch cut on either side, the apex of the V toward the rear. The top and bottom of the sleeve were compressed toward the center line at the muzzle, constricting the emerging pattern of shot in the vertical plane and forcing it to spread horizontally. The sleeve was permanently brazed onto the barrel so that it would not be blown off or rotated by firing the gun.
Early examples of duckbill- equipped shotguns were deployed to Vietnam in the hands of Marines and Navy SEALs. It was found that the open V- notches in the muzzle of the duckbill hung up badly on vegetation as the shotgunner tried to move through thick growth, so the duckbill was modified with a ring around its muzzle to exclude vines and branches. It was discovered that the spreader device worked as advertised, but in reality what was needed in a fighting shotgun was a way of producing dense, lethal patterns.
Spreaders in field testing produced patterns five feet high and twelve feet wide at 30 meters with #4 buckshot loads. At 40 meters, patterns were six feet high and sixteen feet wide. At 40 meters an average sized man would only be hit by a couple of pellets. But with a standard cylinder bored barrel shooting approximately a four- foot circular pattern at 40 meters, some 60% of the shot would strike an average man- sized target.
Still, the duckbill choke had its adherents, among SEALS especially. Development on the idea continued for several years. Clifford Ashbrook and Wilson Wing of Kexplore, Inc. in Houston, TX developed the A&W Diverter in the late 1960s using mathematical concepts, and received patent protection (# 3,492,750) in February 1970.
The HK 512 gas operated 7+1 shotgun, it was manufactured by Franchi for HK under a contract to supply an elite force in Germany (GSG9), i.e. the "Anti-Terrorist Shotgun" . A production over run of 270 units which were imported into the US, employing a shot diverter that creates a rectangular spread .
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