The Thompson Submachine Gun ID Guide, Part V: The Auto-Ordnance, Bridgeport U.S. 1928A1 Thompson Submachine Gun By Frank Iannamico During WWII there was an overwhelming demand for the Thompson Submachine Gun, to supply both U.S. And Allied armies. In 1939, Savage Arms was contracted by Auto-Ordnance to manufacture the weapon.

Due to the complex construction of the Thompson, Savage had a difficult time keeping up with the ever-increasing demand. As a result, the Auto-Ordnance Corporation opened their own factory in 1941 to help fill the Ordnance Department’s requirements for the weapon.

The 1928A1 Thompson Submachine Guns being produced at Auto-Ordnance’s Bridgeport plant were identical mechanically and in appearance to those being made by Savage in Utica, New York. The letters AO preceding the weapon’s serial number on the left side of the M1928A1 model’s receiver will easily identify an M1928A1 Thompson that was produced in the Auto-Ordnance’s Bridgeport, Connecticut plant. A similar AO prefix serial number was applied to the rear of the trigger frame. The early manufacture Auto-Ordnance, Bridgeport guns, like their Savage counterparts, were fitted with the finned barrel and the adjustable Lyman rear sight. There were many Savage and other subcontractor manufactured parts used to assemble the guns produced at the Auto-Ordnance plant. The parts that were manufactured in house by Auto-Ordnance were stamped with the letters AO or AOC. Dragon Ball Z Mugen Edition 2008 Pt 2 Free Download on this page.

As production continued the Auto-Ordnance Thompsons, like the Savage manufactured guns, also began to be fitted with the simple stamped fixed “L” style aperture rear sight. On the Auto-Ordnance, Bridgeport produced Thompsons the “L” style rear sight began to appear on guns at approximately the 80,000 serial number range.

The Thompson Submachine Gun ID Guide, Part II: The Auto-Ordnance, Bridgeport and Auto-Ordnance, West Hurley 1928. Complete Guide Building Your Home Brewery Pdf File. The marking of the serial numbers on many Auto-Ordnance, Bridgeport guns was rather carelessly done, as the numbers are quite often unevenly spaced and out of line. Thompson Submachine Guns of the St. The St Valentine’s Day Massacre was a milestone. Used to connect Thompson submachine guns serial numbers 2347 and. Mar 01, 2009 Hi All, I have an M1 Thompson with two different serial numbers: 9 Is there anything we can tell from serial numbers? When built, who.

However, there was no defining line where the use of the Lyman adjustable sight was discontinued, as they continued to appear sporadically throughout the entire range of serial numbers. In early production the finned barrel was still fitted on the Auto-Ordnance, Bridgeport guns, but was eventually replaced by the easier to manufacture, smooth barrel that began to appear at the 85,000 serial number range. As with the rear sights there was no defining line on the type of barrel that was installed on any particular serial number range on Auto-Ordnance Thompsons.

Even after the smooth barrels began to be fitted, the finned style barrels continued to sporadically appear through the entire serial number range until the end of production. Note; while the “L” sight and smooth barrel began to appear on mid-range serial number Savage 1928’s they appeared on lower numbered Auto-Ordnance, Bridgeport guns. Modern Combat 3 Apk Cracked Free Download more. The reason is that the Savage factory began manufacturing the guns approximately eighteen months before Auto-Ordnance.

Thus, a low numbered Auto-Ordnance 1928 model was manufactured at the same time period a mid-range number Savage gun. The Cutts compensator was retained on all military A-O 1928A1 models throughout production. Most of the Auto-Ordnance, Bridgeport Thompsons were fitted with the late (4th) style compensator that has the Thompson bullet logo on the left side, and the Auto-Ordnance name roll marked across the top of the leading edge.