I acquired this 7” AR-9 barrel for my project to replace my short-horn 4”. The guy didn’t know the actual barrel threads and was listing them as 1/2x24 TPI. Very uncommon these days I told him so he sold it to me at a deal for me to investigate for him. It’s actually the common 1/2x28 TPI like a 9mm handgun or .22 cal. Just what I needed.
But what is the three prong lugs geared to? Roman thought it looked German to him. Anyone with a clue?
![[image]](images/uploaded/2025021303184567ad6495a1177.jpg)
![[image]](images/uploaded/2025021303191367ad64b148d11.jpg)
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What the heck did I buy?!
- WB, 2025-02-12, 20:20
![[*]](themes/default/images/complete_thread.png "Open whole thread")
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It reminds me of
- AlanT, 2025-02-12, 20:33
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It is a three lug mount
- AlanT, 2025-02-12, 20:36
- Well you impressed me! Roman was right on a hunch - WB, 2025-02-12, 22:19
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It is a three lug mount
- AlanT, 2025-02-12, 20:36
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It reminds me of
- AlanT, 2025-02-12, 20:33