I have a Mark 12 Mod H upper from PRI. It's the 1/8 twist. I have a thread protector on it but I do have the proper muzzle device to fit the correct suppressor for the gun. This is the upper only but I do have a complete lower with geisselle SDE trigger and a magpul UBR if anyone wants it as a complete rifle. I'll get dome pics up later. Bought it new. Shot about 50rd and did proper break in. Shoots good but I got an elk hunt to finance.
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