Looking for old colt SP1 update parts

[Garg]

So, a good friend of mine has an old colt sp1, that has the janky front pivot screw/pins, not the current slide out type.
Does anyone know where to get replacement parts, to make it compatible with new uppers? ie. the small push pins.

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[ma96782]

IIRC.....there weren't exactly conversion "push pins". The replacement was more like a new off set screw which allowed the small pin uppers to mate with the old SP1.

BUT.....



And, things could have changed.

Aloha, Mark

 

[Garg]

IIRC.....there weren't exactly conversion "push pins". The replacement was more like a new off set screw which allowed the small pin uppers to mate with the old SP1.

BUT.....

View attachment 1004983

And, things could have changed.

Aloha, Mark

So there IS a solution??? Please let me know. the upper is getting pretty old, and the lower is registered/stamped.

 

[ma96782]

Somone out there probably still makes them? Maybe?

Check with Brownells.

Aloha, Mark

 

[Garg]

Thanks, but what the hell is that thing even called??? LOL

never mind, I found it

 

[jbett98]

So there IS a solution??? Please let me know. the upper is getting pretty old, and the lower is registered/stamped.

When you stated "registered / stamped" what does that mean?

 

[Garg]

When you stated "registered / stamped" what does that mean?

well, it's either an SBR or an MG.

 

[Newberg]

Check with John Yates at AR15sport.com

 

[titsonritz]

So, a good friend of mine has an old colt sp1, that has the janky front pivot screw/pins, not the current slide out type.
Does anyone know where to get replacement parts, to make it compatible with new uppers? ie. the small push pins.

Specialized Armament is pretty good for hard to find Colt items, though can be spendy.
https://www.specializedarmament.com...n-assembly-0.250/0.312-conversion-kit-two-pc/

 

[HB of CJ]

Part of the charm of the SP-1 is that it has lots of strange parts. The screw type front take down pin is only one of several. Why not keep it OEM? Just me.

hundreds of builds but years and years ago. Now an old coot.

 

[gmerkt]

One of the rifles I've kept is a Colt sporter made during the Ban era. It has the screw for a pivot. I've thought about changing it but never have gone to the bother.

 

[ma96782]

Maybe, I read this wrong from the start?

I thought that you were looking for a replacement screw/pin. To fit a small hole upper with the old large hole SP1 lower. Rrrright......use the part in the picture (post #4) for that.

BUT.......
If you are just looking to get a push pin to replace the original SP1 screw arrangement.....same hole size upper and lower.....then, that's a different-looking part. I believe that they are still available.


Rrrrright...... they don't exactly look like a push pin (as we know them today). Like these.


Aloha, Mark

PS...
Note what is said about small hole vs big hole.

AR-15 Upper Receiver Comparison and FAQ

www.biggerhammer.net

check with Model One.
https://www.model1sales.com/index.c...onid=65FA048FEF378033C75C979C1928CEBC.cfusion

 

[gmerkt]

One of the rifles I've kept is a Colt sporter made during the Ban era. It has the screw for a pivot. I've thought about changing it but never have gone to the bother.

I took out the Colt Target Match, it has a 1/4 inch hinge. This thread has stimulated me to finally get something that is quick detachable, such as sold at Brownell's, what's another $20 plus shipping down the dumper hole??

 

[jbett98]

I'm leaving mine all original. It's a minty safe queen and the less I touch it, the more it's worth.