Patent ID: 8568143

Claim:
A training barrel having a central axis for housing a light emitting insert comprising: an elongate member which comprises a first end, a second end, and a first internal surface extending from the first end through the elongate member to the second end which comprises a first segment abutting the first end which defines a first volume having a first cross sectional area perpendicular to the central axis, a second segment adjacent the first segment which defines a second volume having a second cross sectional area perpendicular to the central axis, the second cross sectional area being less than the first cross sectional area, a third segment proximate the second segment which defines a third volume having a third cross sectional area perpendicular to the central axis, the third cross sectional area being greater than the second cross sectional area, a fourth segment situated between the third segment and the second end which defines a fourth volume having a fourth cross sectional area perpendicular to the central axis, the fourth cross sectional area being less than the third cross sectional area; wherein the third segment is configured and dimensioned to receive a light emitting insert, and such that the fourth and second segments are configured and dimensioned to secure the light emitting insert in the third segment.