This is from a posting on the Napoleon Series discussing this in 2005. The posting is by Michael Tänzer, who runs the KGL German website, and is probably the leading expert on this matter.
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The collections under Hann. 38 D in the "Niedersächsisches Hauptstaatsarchiv Hannover" (HStA) are the original KGL papers. Nr. 180 contains several returns of clothing, equipment and weapons which were given over to the Royal Hannoverian Army on the disbandment of the KGL in 1816. These are the returns with dates nearest to Waterloo I could find in the HStA.
Page 8 is the "Return of Arms of the 2nd Light Battn. Kings German Legion at Steierberg the 5th February 1816" written in English and signed "Geo Baring, Lt Colonel". The return is in the form of a table with the columns "Rifles" and "Musquets" and the following information:
"In possession with the Battn. [last 4 words underlined]
belonging Originally to the Battn. | 228 | 67
received from the 3rd Line Battn. | | 26
received from the 5th Line Battn. | | 4
Total | 228 | 97
In Store at Ostend [last 3 words underlined]
belonging Orginally to the Battn. | | 85
received from the 3rd Line Battn. | | 28
received from the 5th Line Battn. | | 24
Total | | 137
In possession of Men Sick absent and on Command | 12 | 14
Gran Total | 240 | 248
Recapitulation [underlined]
belonging Originally to the Battn. | 240 | 166
1st Decbr 1815 received from the 3rd Line Battn. | | 54
2nd Do. 1815 received from the 5th Line Battn. | | 28
Total | 240 | 248"
HStA Hann. 38 D, Nr. 179, Pag. 3 is a report from the 1st Light Battalion KGL in German, dated 14 February 1816. It gives the result of a committe meeting inspecting all firearms returned from the companies and is signed by the president of the committe Captain Schaedtler. The report lists 300 rifles ["Büchsen mit Hirschfänger"] as serviceable, 20 rifles needing repairs and 25 rifles unserviceable; no muskets are mentioned.
HStA Hann. 38 D, Nr. 180 has also reports from the line battalions of the KGL in English:
Pag. 11: 1st Line Battalion, 1 February 1816, 65 rifles, 469 muskets
Pag. 16: 2nd Line Battalion, 13 February 1816, 84 rifles, 401 muskets
The report of the 5th Line Battalion is in German and signed on 27 January 1816 by Captain Georg Nölting of Wheatley fame:
Pag. 25: 49 rifles ["Büchsen"], 234 muskets ["Gewehre" !!!]
Pag. 28 is a report on the accoutrements in possession of the 5th Line Battalion and signed on 9 February 1816 by Lt.-Col. von Linsingen. The table is divided in several main columns: "Serjeanten", "Tambourn", "Pioniers", "Schützen" [riflemen], "Soldaten". The undercolumns under "Schützen" give "Koppel" [waistbelts] and "Pulverhörner" [powderhorns] for 50 men, clearly indicating that these were really riflemen.
All these numbers, compared with the strength of the battalions at Waterloo, clearly show that the light companies of the line battalions were riflemen, at least at Waterloo. A large proportion of the 2nd Light Battalion men was armed with muskets, whereas the men of the 1st Light Battalion seem to have been all riflemen.
The 1813 drill instructions were not used by KGL light infantry but written by KGL officers for the use of the newly formed Hannoverian Levies, the later field battalions, because of the lack of any standardised drill instructions in 1813. The title is misleading! In the HStA are many propositions for altering the pre 1803 Hannoverian drill to fit into the British drill system. Unfortunately the end product, of which some handwritten adjutant's versions may be found in the HStA, was never printed. The 1802 Hannoverian drill had a large part on the exercises of the sharpshooters which was incorporated in the KGL drill. The new Hannoverian formations of 1813, however, had no use for this. The weapons for them were sent from England and in HStA Hann. 38 D, Nr. 182, Pag. 8 is an "Account of Small Arms and Accoutrements received and issued by Dpy. Asst. Commissy. Taylor in and for the Service of Hanover" dated 8 October 1814 and countersigned by Lt.-Gen. Baron Decken. All weapons received from 6 September 1813 until 23 July 1814 were "Muskets with Bayonets". These were distributed to the Hannoverian battalions including the Lüneburg FB! Memoirs of officers from the so called light battalions never mention rifles but always bayonets, not "Hirschfänger".
All battalions of the Hannoverian Army were re-equipped (partly changing their uniforms) before the Waterloo campaign. It is possible that their sharpshooters received rifles at that point. According to the memoirs of Lieutenant and Adjutant Carl von Berckefeldt, Landwehrbataillon Münden, his battalion used the pre 1803 Hannoverian regulations and so had sharpshooters, but all men were equipped with the British musket. The "sharpshooters" of the Hannoverian units at Waterloo seem to have been the equivalent of the British light companies. The only exception was the Jäger Corps, which of course was armed with (hunting) rifles.
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Rod