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Page AR-15 » AR-15 / M-16 Retro Forum
AR Sponsor: bravocompany
Posted: 8/20/2006 1:55:01 PM EDT
This is my first build and found this candidate. The upper I got at a local gunshow. Its a mid '70's vintage A1. The B/BC is a spare. The gas key is pretty worn and the bolt has some markings that I haven't been able to decipher. It looks like a P in a circle and an M in a circle. Any ideas?
http://i104.photobucket.com/albums/m177/1Raider75/M16pics001.jpg
http://i104.photobucket.com/albums/m177/1Raider75/M16pics002.jpg
http://i104.photobucket.com/albums/m177/1Raider75/M16pics003.jpg
http://i104.photobucket.com/albums/m177/1Raider75/M16pics004.jpg
Link Posted: 8/20/2006 2:28:21 PM EDT
[#1]
To hell with the bolt. tell us about the H&R M16 lower..
Link Posted: 8/20/2006 2:33:37 PM EDT
[#2]
I got the lower from CMMG. It's a Stemple redo. Paperwork from ATF was a snap and was returned super quick. Funny thing is that it is registered as being made by H&R and not Stemple. I am going to send it off to US Anodizing to get refinished as it is too dark for my upper and whatever finish is on there is chipping off. Once I get it back I'll post some pics of the whole enchilada.
Link Posted: 8/20/2006 3:55:04 PM EDT
[#3]

It looks like a P in a circle and an M in a circle. Any ideas?


Early hard-chrome-plated bolt acid-etched with M & P, signifying the bolt has been Magnetic particle inspected and Proof tested.
Link Posted: 8/21/2006 10:00:23 AM EDT
[#4]
Thanks, Dump. That makes sense. All I need now is a decent Safety Selector that doesn't have the ambi markings.
Link Posted: 8/21/2006 11:32:50 AM EDT
[#5]

Quoted:
Thanks, Dump. That makes sense. All I need now is a decent Safety Selector that doesn't have the ambi markings.


I just saw a ton of those at the gun show.  Don't know the quality.
Link Posted: 8/21/2006 12:24:16 PM EDT
[#6]
Hi Tman,
    Post pics of the disassembled bolt and carrier showing the extractor spring (& insert if it has one), any markings (like "C") on the left side of the carrier, and staking on the carrier key. This will yield better info on the B&C group in your Colt Harvey upper.
    Stemple was very creative in putting his ATF required info on his rewelds: under the grip, inside the mag well, etc. He preferred to reweld H&R M16 receivers, but did a few Colts as well. Never seen a Stemple rewelded Hydromatic, but he probably did those also. Do a FOIA on your NFA receiver for complete info. Where did he mark yours?
                                                  Thanks,
                                                  Carey (Kingwood, TX)
Link Posted: 8/21/2006 5:35:56 PM EDT
[#7]
Carey,
Here are some pics. The bolt is not marked.

http://i104.photobucket.com/albums/m177/1Raider75/TSMGpics002.jpg
The extractor has no insert (little rubber thingy) in it.
http://i104.photobucket.com/albums/m177/1Raider75/TSMGpics009.jpg
The carrier key has two square stakes.
http://i104.photobucket.com/albums/m177/1Raider75/TSMGpics008.jpg
I wont be using this one as it is a spare and the bolt lugs are kinda worn on the edges and the carrier key has a mild bell shape to it.
Link Posted: 8/21/2006 6:04:50 PM EDT
[#8]
The staking for the key on the bolt carrier makes me think that part is Colt.





Quoted:
Carey,
Here are some pics. The bolt is not marked.

i104.photobucket.com/albums/m177/1Raider75/TSMGpics002.jpg
The extractor has no insert (little rubber thingy) in it.
i104.photobucket.com/albums/m177/1Raider75/TSMGpics009.jpg
The carrier key has two square stakes.
i104.photobucket.com/albums/m177/1Raider75/TSMGpics008.jpg
I wont be using this one as it is a spare and the bolt lugs are kinda worn on the edges and the carrier key has a mild bell shape to it.
Page AR-15 » AR-15 / M-16 Retro Forum
AR Sponsor: bravocompany
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