Editing Thompson submachine gun (section)

===Semi-automatic===
====Model 1927====
The Model 1927 was the open bolt semi-automatic version of the M1921. It was made by modifying an existing Model 1921, including replacing certain parts. The "Thompson Submachine Gun" inscription was machined over to replace it with "Thompson Semi-Automatic Carbine", and the "Model 1921" inscription was also machined over to replace it with "Model 1927." Although the Model 1927 was semi-automatic only, it was easily converted to fully automatic by installing a full-auto Model 1921 fire control group (internal parts). Most Model 1927s owned by police have been converted back to full-auto.{{sfn|Iannamico|2000|p=21}} The original Model 1927 is classified as a machine gun under the [[National Firearms Act]] of 1934 (a) by being "readily convertible" by swapping parts and (b) by a [[Open bolt#Legality|1982 BATF ruling]] making all open bolt semi-automatic firearms manufactured after the date of this ruling classified as machine guns.

====Model 1927A1====
The Model 1927A1 is a semi-automatic replica version of the Thompson, originally produced by Auto-Ordnance of [[West Hurley, New York|West Hurley]], New York for the civilian collector's market from 1974 to 1999. It has been produced since 1999 by Kahr Arms of [[Worcester, Massachusetts|Worcester]], [[Massachusetts]]. It is officially known as the "Thompson Semi-Automatic Carbine, Model of 1927A1." The internal design is completely different to operate from the closed bolt and the carbine has a barrel length of {{convert|16.5|in|mm|abbr=on}} (versus open bolt operation and barrel length of {{convert|10.5|in|mm|abbr=on}} for the fully automatic versions). Under federal regulations, these changes make the Model 1927A1 legally a rifle and remove it from the federal registry requirements of the [[National Firearms Act]]. These modern versions should not be confused with the original semi-automatic M1927, which was a slightly modified M1921 produced by Colt for Auto-Ordnance.

The Model 1927A1 is the semi-automatic replica of the Thompson Models of 1921 and 1927. The "Thompson Commando" is a semi-automatic replica of the M1928A1. The Auto-Ordnance replica of the Thompson M1 and M1A1 is known as the TM1 and may be found marked "Thompson Semi-Automatic Carbine, Caliber .45M1".

====Model 1927A3====
The Model 1927A3 is a semi-automatic, .22 caliber version of the Thompson produced by Auto-Ordnance in West Hurley.

====Model 1927A5====
[[File:BATFE Firearm Classification Letter.jpg|thumb|Auto-Ordnance 1927A5 DOJ BATFE Firearm Classification Letter]]

The Model 1927A5 is a semi-automatic, .45 ACP pistol version of the Thompson originally produced by Auto-Ordnance in West Hurley from the 1970s until the late 1980s or early 1990s. It featured an aluminum receiver to reduce weight. It has since been replaced with the Kahr Arms TA5 Pistol, which features a 10.5" barrel and steel receiver, unlike the 1927A5's 13" barrel and aluminum receiver.

As per the NFA (National Firearms Act of 1934), the "1927A5 .45 ACP Pistol" is simply classified as a "Firearm" (Any type of firearm with an overall length of 26" or greater, that does not have a buttstock) as it neither fits the definition of a Pistol or Rifle under federal law. This categorization also legally allows it to have 1921 or 1928 style foregrip equipped, unlike other "pistol style" Thompson variants, without an AOW (Any Other Weapon) Tax Stamp.

====1928A1 LTD====
The 1928A1 LTD is a civilian semi-automatic conversion by Luxembourg Defense Technology (LuxDefTec) in Luxembourg. They are made from original 1928A1 guns of various appearance (with or without Cutt's compensator, ribbed or smooth barrels, adjustable or fixed sights), that were imported [[Lend-Lease]] guns from Russia.