Abstract: The subject of this article is the development of manual automatic weapons in Russia (the turn of the 19th and 20th centuries) – the selection and refinement of design and compositional solutions. The level of sophistication of the arm's designs of this period did not allow for their mass production and operation. This situation had several objective reasons. Firstly, there was a lack of specialized design bureaus and experienced designers with experience in working with automatic weapons in the 1900s to 1910s. Nevertheless, efforts by the Main Artillery Administration led to a series of initiatives aimed at providing the army with modern weaponry. Foreign inventors were engaged, and factories, including the Sestroretsk Arms Factory, became centers for creating new types of firearms. Overall supervision of the work on new weapons was carried out by the GAU (in a rather general manner), so the level of sophistication of the created sample depended on the talent of the inventor. The following research methods were used: historical-scientific analysis of special literature, comparative-historical method, processing of archival data from the funds of state and departmental archives (Central State Historical Archive of St. Petersburg, Scientific Archive of the Military Academy of the General Staff of the Armed Forces of Russia). To study the sample of the "machine gun-rifle" – a construction characteristic was compiled through disassembly, examination of the structure and functioning of parts and mechanisms. The scientific novelty is due to the generalization of previously unpublished documentary materials, introducing into scientific circulation one of the few surviving experimental samples from the specified period – the "machine gun-rifle" designed in 1900-1901. The identification of such items in itself is a challenging task due to the absence of a unified established terminology in sources from the 1900s. Thus, based on newly discovered archival materials and the study of the preserved sample, it is concluded that the experience of developing A. Odkolek's machine gun in Russia with the participation of specialists from the Sestroretsk Arms Factory could have had a positive impact on the development of domestic engineering personnel for arms manufacturers, particularly in the context of designing automatic rifles in the 1900s to 1910s. During this period, Russia began to form its own, original, and independent design school for automatic weapons, free from direct foreign involvement.

Keywords: Sestroretsk Arms Factory, archival research, light machine gun, Adolf Odkolek, attribution, machine gun, weapons design, Main Artillery Directorate, automatic weapons, weapons