Help with recreating SP1 Rifle

I have a Colt SP1 lower and I am trying to find a an upper and could use some advice. Is this an SP1 lower or, as someone told me, an M16 upper: http://www.gunbroker.com/Auction/Vie...Item=188559428
Any advice on what I should be looking for would be appreciated.
Thank you.

That's an M16 upper. You need a big pin upper from an SP1, specifically.

May be able to help with a Colt upper

You already have a SP-1 lower, but not the upper, and you want a traditional SP-1 20" upper for it?

Quote:

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Originally Posted by Templar

You already have a SP-1 lower, but not the upper, and you want a traditional SP-1 20" upper for it?

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Yes or as close as I can get.

PM me if you want a cheap SP1 upper. No bolt carrier group however.

The GB ad was a 604 M16 upper, not an SP1 upper.