The level 2 Sentry gun appears to be ejecting Shotgun shells.

等级2的步哨防御枪弹出的似乎是散弹枪的弹壳。

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Documents indicate that authorities found a gun safe with shotgun shells and numerous boxes of bullets.

NPR: Arsenal Of Weapons Found In Newtown Gunman's Home

Most of the spent rounds -- 65 -- were .223 caliber, while six were shotgun shells and five were .40 caliber.

CNN: STORY HIGHLIGHTS

But this isn't the first time in the primary race that the New York senator has spoken about unloading some shotgun shells.

CNN: 'Bittergate' sparks new look at candidates and guns