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Upper Identification

300_whisper

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The Hen that laid the Golden Legos
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Anyone know what this is? I’m assuming grid defense? Does anyone know what the BCG is? Thanks for your time and help.

7.5 inch, .300BO, MLOK rail, and generic charging handle, came with the brake in the photo. Full disclaimer. Trying to sell or trade it but want to properly identify it for any potential buyers.

3D9C6AB8-5789-4331-90A6-69065B4C8AB2.jpeg

AF28AA9C-1668-4549-8196-1A3081FAD7D6.jpeg

E1BE949C-2D4D-498C-9320-9BED12C0E8E0.jpeg
 
you’re right it is. Well one piece down. Also the forge marking is a square on the receiver.

Square Forge doesn't narrow it down much. There are lists out there of which vendors use square forge blanks.

Might be this one with a few swapped parts:

Or it could be a takeoff special, put together from all the extra parts in the parts bin.
 
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