Editing Thompson submachine gun (section)

====Model 1919====
Starting with the Serial no. 11, the Model 1919 takes the final appearance of the later Thompsons with the rear sights and butt stock. The Model 1919 was limited to about 40 units; the first built did not use the drums, as it was too difficult to fire. Many variations have been noted within this model. The weapons had very high cyclic rates up to 1,500&nbsp;rpm.{{sfn|Bearse|1994|p=210}} This was the weapon Brigadier General Thompson demonstrated at [[Camp Perry]] in 1920. A number of Model 1919s were made without butt stocks, rear and front sights, but the final version closely resembled the later Model 1921. This model was designed to "sweep" trenches with bullets. The [[New York City Police Department]] was the largest purchaser of the M1919. Some experimental calibers aside from the standard [[.45 ACP]] (11.4x23mm) were the [[.22LR]], [[.32 ACP]], [[.38 ACP]], and [[9mm Luger|9mm]].<ref name="Fitz2487"/>