It was originally part of the Grenadier range of science fiction wargame miniatures and vehicles made in white metal and resin. I believe it was part of the Kryomek game. The fantasy side of Grenadier was Fantasy Forge.
It was re-released by Grendel as the "A.T.A.C. APC", with the model/product number F0007. A few modelling and gaming forums have the number as F007, and some call it the Scarab APC, which is a good name for it.
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^ F007 Scarab APC - according to Chronofus. Note that the hull is in more pieces than the model I own. It looks like this one has an upper and lower hull, plus a separate 'front bumper'. Possibly the model in this picture was 'reverse engineered' from an older version. This photo also shows the moulded tow rope that I clipped off my model.
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^ F0007 ATAC APC according to the Miniatures Atlas. Note the one-piece hull.