Five upright stones, three on the north side and two on the south, support a single flat roofstone above a narrow gallery barely two and a half metres long and little more than a metre wide. It is easy to mistake for a natural arrangement, which is precisely what makes it worth pausing over.

Wedge tombs are among the most numerous megalithic monument types in Ireland, built during the late Neolithic and early Bronze Age, generally somewhere between four and five thousand years ago. The name describes their characteristic shape: a burial gallery that narrows and lowers toward the back, typically aligned with the wider end facing west or southwest. The Kilbeg example is aligned roughly east-northeast to west-southwest, which fits that general pattern. What complicates matters here is the degree of ruin. Researchers Claffey and Ó Nualláin, whose work from 1983 and 1989 respectively remains the main documentation for the site, both noted that the remains are too fragmentary to classify the monument with complete confidence. Interpreting it as a wedge tomb is plausible given what survives, but the word "inconsistent" is conspicuously absent from the caution rather than the conclusion.