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11/16/2012 10:45:59 AM EDT
Could someone be kind enough to explain what the A-3 marking above the ejection port on my slickside carry handle upper means?

Gratitude in advance!
11/16/2012 11:37:49 AM EDT
[#1]
Quoted:
Could someone be kind enough to explain what the A-3 marking above the ejection port on my slickside carry handle upper means?

Gratitude in advance!


for a forge mark from the casting.  most manufacturers grind it off before finishing, sometimes it's left.
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