American Trench Knife M1917. The weapon's long, triangular blade has no edge to speak of and can only be used to thrust with. Unlike most knuckleduster knives, it is intended to be used with the blade uppermost, with the thumb on top and secure against the downturned quillon. Low-Poly PBR Model, include: fbx; obj, mtl; Normal Map, Roughness Map, Ambient Occlusion Map, Metallness Map, Height Map, Albedo