I recently ordered a ss 16" midlength CAR A4 upper. I was told I would be able to order it with a wylde chamber. Just got it in the mail yesterday. I looked at the packing slip but it did not specify what chamber. I took off the hand guards and the only markings I saw were "512". What does this translate to?
have the stainless barrells always had a wylde chamber? The reason I ask is that i bought a 1-8 twist 16 inch h-bar stainless Rock River Barrel from RB Precision about 2 years ago and I hope it does have a wylde chamber.