Browning machine gun caliber .50, M2, aircraft, fixed and flexible. Page: 35
54 p. : ill. ; 22 cm.View a full description of this book.
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TM 9-225
BROWNING MACHINE GUN, CALIBER .50, M2 16-19
whether or not it will shoot accurately and function properly when
needed. The bore and chamber must be kept in perfect condition for
accurate shooting. Also, it is just as important that the receiver and
moving parts be kept clean, lubricated, and in perfect condition for
efficient functioning.
17. Points to be observed before flight.-The following points
must be observed before leaving the ground:
a. Wipe bore and chamber of gun barrel.
b. See that adjusting screws are screwed in tight against buffer
disks in back plate.
c. Test functioning of gun by hand, using dummy cartridges.
d. Test functioning of operating slide (fixed gun only) or retract-
ing slide (flexible gun only).
e. Oil carefully.
f. See that sight bases are clamped securely in place (flexible gun
only).
g. Make sure that ammunition belt is in good condition and loaded
properly.
A. Place belt carefully in ammunition chest and see that metallic
belt link chutes are in good condition and in proper alinement.
i. Load gun partially or completely as directed.
18. Points to be observed after flight.-The following points
must be observed as soon after a flight as practicable:
a. Unload gun completely and remove belt from ammunition chest.
b. Clean bore and all working parts. If this cannot be done at
once, oil carefully to prevent rust.
c. Release firing pin spring.
d. The armorer must get a detailed account from the gunner or
pilot of the gun's behavior in the air. If stoppages have occurred,
their cause must be determined and corrected immediately.
e. At the first opportunity, dismount gun; clean, oil, and inspect
all parts; make needed repairs and replacements.
f. On assembling, check operation with dummy cartridges and re-
lease firing pin spring after insuring that functioning and adjust-
ments are correct.
19. Care and cleaning of gun.-a. Cleaning bore.-The bore
should be thoroughly cleaned with rifle bore cleaner. This cleaner
is a combination solvent and preservative which is issued for use
by troops in the field for cleaning small arms. When rifle bore
cleaner is not available, the bore should be cleaned with hot soap
and water solution, soda ash and water solution (11/2 spoonfuls per35
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United States. War Department. Browning machine gun caliber .50, M2, aircraft, fixed and flexible., book, April 30, 1942; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc29988/m1/37/: accessed May 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.