<P> As a sniper, Kyle was often asked about his weapons . While in training, he used four different rifles in order to know which weapon was the most useful in the given situation . In the field, he used the following: </P> <Ul> <Li> a semi-automatic 7.62 NATO Mk 11 sniper rifle (patrol) </Li> <Li> a 5.56 NATO Mk 12 Designated Marksman Rifle modified with the lower receiver of an M4A1 to get a collapsible stock and allow full - auto fire (urban patrol) </Li> <Li> a . 300 Winchester Magnum M24 sniper rifle with McMillan stocks and customized barrels, later replaced with a . 300 Winchester Magnum Accuracy International . These two rifles were the ones he mostly used while in overwatch . </Li> <Li> Various rifles chambered in . 338 Lapua Magnum used for long - range shooting . </Li> </Ul> <Li> a semi-automatic 7.62 NATO Mk 11 sniper rifle (patrol) </Li> <Li> a 5.56 NATO Mk 12 Designated Marksman Rifle modified with the lower receiver of an M4A1 to get a collapsible stock and allow full - auto fire (urban patrol) </Li>

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