Any help would be appreciated.
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So do you want to know what each part is or what are they for ? If the latter, then looks to me they are for a British ANM2 MK3. The dead give away is the side rails on the lock frame. American versions do not those rails. Some parts are interchangeable with the American versions, but not most of them. The booster in the first picture looks like American, as does the bolt and some of the other parts. The rest of the pictures look like the British version.
Man, they lightened the crap out of those bolts, presumably to get the ROF up.
There are a couple of guys over on gunboards in the machine gun section that may be able to help you out. Post a few pics over there
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