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Discussion Starter #1
Are M14 trigger group parts marked accordingly so you can identify if all GI? If someone had a noted photo for reference I'd appreciate it.
 

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USGI trigger housings, hammers and some safeties are marked. Triggers can sometimes be identified. Small parts are unmarked.
 

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Discussion Starter #4
I have an SAI trigger group presently. local gunshop claims he has an all GI assembly. Im was just
 

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The trigger housing part number is 7267030. Following it will be the manufacturer. USGI are SA, HR-N, OM-N, 66118 or TRW. I'm not sure how the DPMS ones were marked. Their CAGE Code is 40554. Commercial SAI housings will usually have a dash and letter after the part number. I, O, G, etc.

Commercial hammers are unmarked. USGI can have any one of dozens of combinations, since M1 Garand hammers are included.
 
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