This prototype was likely created while developing the Berserker Predator's shoulder cannon seen in the film. This model cannon was 3d printed in grey resin and features three cannon pieces extending from a center piece.
The item does feature some damage, one laser cannon is separated from the others and broken in half, and wear including paint stains and resin chips. However it remains in otherwise good condition.
Item size - 7.5" x 3.5" x 3.5" (19.05cm x 8.89cm x 8.89cm)
This item comes with a Prop Store Certificate of Authenticity.