Colt AR 15 SP1 Carbine

[OLIAR15]

I just bought a 1980 made Colt AR 15 SP1 carbine. I had bought an SP1 rifle last year, so I’m thrilled to have a carbine to go with it. Those are quite rare here in Switzerland. Paid $ 1600 for it.

And it has a few strange features, if anyone has infos pls chime in.

https://www.AR15.Com/media/mediaFiles/390738/9D453978-7C19-4982-BA72-6314082FF5FB_jpeg-1188914.JPG
https://www.AR15.Com/media/mediaFiles/390738/ABE347C7-B77F-4036-BD57-E22E54B4F32B_jpeg-1188916.JPG

Chromed BCG

https://www.AR15.Com/media/mediaFiles/390738/1E90009A-A8B2-4017-A63A-014C96F0A80A_jpeg-1188917.JPG

Funny looking front pin

https://www.AR15.Com/media/mediaFiles/390738/494F2029-2D11-4F2C-AD93-4AA2D3F6A383_jpeg-1188919.JPG
https://www.AR15.Com/media/mediaFiles/390738/C61DB756-E276-4921-BFF7-5E19242B417C_jpeg-1188920.JPG

https://www.AR15.Com/media/mediaFiles/390738/7512A4B5-9381-42F7-9AB5-310209DB9886_jpeg-1188921.JPG

Colt mag with a circled (1)

https://www.AR15.Com/media/mediaFiles/390738/FDE8B833-AFA8-4187-A2DE-DBDDABD56758_jpeg-1188922.JPG

Vinyl acetate covered stock

https://www.AR15.Com/media/mediaFiles/390738/BA6A1B76-C664-4219-8CC7-A87955142EA0_jpeg-1188923.JPG

The nut is staked in two places, with a dab of black paint

https://www.AR15.Com/media/mediaFiles/390738/2F4559E4-3372-43E8-BE1D-3F903030ABC8_jpeg-1188924.JPG

https://www.AR15.Com/media/mediaFiles/390738/EA59A073-24D2-41BB-B958-A3EFA9D2547A_jpeg-1188925.JPG

Paint near the bolt release lever

https://www.AR15.Com/media/mediaFiles/390738/D33BB90B-B898-4662-882B-727A5431F276_jpeg-1188926.JPG

Full auto hammer

https://www.AR15.Com/media/mediaFiles/390738/EDD23DFD-C2D7-4E1E-A4B6-8D733E70AB97_jpeg-1188927.JPG

Sear pin and full auto selector

https://www.AR15.Com/media/mediaFiles/390738/DA2E3203-75D1-4AF3-80C5-A5EEF034648C_jpeg-1188928.JPGhttps://www.AR15.Com/media/mediaFiles/390738/C6F2692C-6A7A-492A-9BA9-4E8D33F4CF62_jpeg-1188929.JPG

The pin is quite lose and falls off

https://www.AR15.Com/media/mediaFiles/390738/EC3F9123-2895-4A7B-8E2F-2A70F80CFE52_jpeg-1188930.JPG

M16 BCG

https://www.AR15.Com/media/mediaFiles/390738/DCE1BAD3-C688-4797-A48E-724BAD24F208_jpeg-1188932.JPGhttps://www.AR15.Com/media/mediaFiles/390738/42B6523E-BBA3-49AB-8306-DEB38035D7D6_jpeg-1188933.JPGhttps://www.AR15.Com/media/mediaFiles/390738/3E20FC07-66B3-49F5-8025-C3DDBB495C2C_jpeg-1188934.JPGhttps://www.AR15.Com/media/mediaFiles/390738/2A9DF6C7-A6E8-4DE6-AB84-5C228F1BC726_jpeg-1188935.JPGhttps://www.AR15.Com/media/mediaFiles/390738/F7F9DDA1-FF52-4572-BB67-7686116AF8AC_jpeg-1188936.JPG


So what’s the story, did Colt build some full autos SP1 carbines ? Or was this transformed by a previous owner ? The auto sear is missing, and I bought this carbine as a semi auto. Could the sear be installed ? I already have two full auto rifles, an M16A1 and an XM177E2.

[Firefly]

Looks aftermarket conversion to me. IIRC a factory FA Colt would have been marked M16 or M16A1 for their export. Plus would’ve had 14.5 barrel and normal pivot pin

JMO

[militarymoron]

If it's the big hole pivot pin, that's just an aftermarket pin instead of the double screw. Is the auto sear hole anodized inside? Looks from the photo that it may have been drilled by someone. That should be a good clue as to whether it came from the factory like that. The auto sear pin needs the auto sear installed to be retained.

[OLIAR15]

And pic of both SP1 together

https://www.AR15.Com/media/mediaFiles/390738/DA6FA067-C7F1-4545-BD2F-9159E1AE05A0_jpeg-1189406.JPGhttps://www.AR15.Com/media/mediaFiles/390738/F84FA3B6-ECEF-4BB8-9A41-16EA9D8691F8_jpeg-1189407.JPG

[ALCOAR]

Wow that makes me so jelly :D

That stock is just cherry. I want a SP1 carbine so bad. Let alone one that has a happy switch.

[Firefly]

You need Tiger Stripes. They make SP1 anything mehr besser.

[CAMagnussen]

Definitely something funky with the OP's AR, but ... cool.

[Firefly]

Definitely something funky with the OP's AR, but ... cool.

It’s a conversion. Look at the sear hole. See the silver. It’s gonna walk no matter what. I wouldnt bother with the pin. Or get something rubber to fill in the hole but not interfere with the FCG

[Renegade04]

Congrats on getting the SP1 carbine. I picked up my SP1 carbine (1981) a few years ago. My SP1 (1977) needed some company.

https://i.imgur.com/iopKdMl.jpg

https://i.imgur.com/kBbn4ru.jpg

[OLIAR15]

Wow that makes me so jelly :D

That stock is just cherry. I want a SP1 carbine so bad. Let alone one that has a happy switch.

Yes the stock is very nice.

Identical to my XM177E2, except for the condition; one probably went to war, the other is just a toy.

https://www.AR15.Com/media/mediaFiles/390738/783F09CB-A310-4638-B5F2-FBCA9E944CC1_jpeg-1188886.JPGhttps://www.AR15.Com/media/mediaFiles/390738/5F4CF6D2-BD44-4F39-A4CE-B9A4D6CFA578_jpeg-1188887.JPGhttps://www.AR15.Com/media/mediaFiles/390738/9ADFD374-D7AD-4450-BE31-7B9F460F70DE_jpeg-1188888.JPGhttps://www.AR15.Com/media/mediaFiles/390738/2236B344-54BF-4F3C-9B4C-6FFF6A90B9AA_jpeg-1188889.JPGhttps://www.AR15.Com/media/mediaFiles/390738/9FCE41F4-A49C-4270-BE91-3B3F0681C455_jpeg-1188890.JPG

[OLIAR15]

You need Tiger Stripes. They make SP1 anything mehr besser.

Tiger stripes ?

[OLIAR15]

Congrats on getting the SP1 carbine. I picked up my SP1 carbine (1981) a few years ago. My SP1 (1977) needed some company.

https://i.imgur.com/iopKdMl.jpg

https://i.imgur.com/kBbn4ru.jpg

Nice, it’s neat having both

[JediGuy]

Tiger stripes ?

Vietnam era camouflage design

https://www.guns.com/news/review/gun-review-colt-le6920-tiger-stripe

[Firefly]

Yes Tiger Stripe camo.

XM-177E2s certainly look cool but at the end of the day the M16 Carbine was an improvement.

Probably handier.

https://3.bp.blogspot.com/-TLhuGmFi6Vc/WZiSwPvE3PI/AAAAAAAAA3g/Pm8FlhlavlsAdLnzKwYx_kCgRtzCafrjwCLcBGAs/s1600/DA-ST-86-02617.JPEG

It was still a CAR-15. CAR-15 is almost as blanket as “M4”.

If I ran into another SP1 carbine I might take the plunge. Mine is terribly comfortable especially with the Colt optic.

[halfmoonclip]

Certainly modded after the fact; lot of years since my M16A1, but I presume inside the receiver is relieved enough for an autosear. IIRC, this side of the pond, even the hole would be illegal.
Presume full auto would be legal in Switzerland, might as well get the missing parts.
I'd hate to feed a full auto, but it would be great to own something select fire.
Moon