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2/11/2017 7:06:57 PM EDT
Could someone answer a question for me , I'm looking at an SP1 Serial number SP110630 the barrel is marked CMPB is this the correct barrel marking for this year rifle or should it be marked CMP Chrome Bore ?
Thank you
Bill
2/11/2017 3:35:33 PM EDT
[#1]
Wrong forum boss. Try the retro discussion forum.
here
2/11/2017 7:20:13 PM EDT
[#2]
Retro Black Rifle says that 6 digit 110 thousand was 1979.
CMP Chrome Bore fits.
2/11/2017 7:23:27 PM EDT
[#3]
Quoted:
Could someone answer a question for me , I'm looking at an SP1 Serial number SP110630 the barrel is marked CMPB is this the correct barrel marking for this year rifle or should it be marked CMP Chrome Bore ?
Thank you
Bill
View Quote


That is a later serial number than my 1977 SP1 (SP75XXX) and the barrel is marked C MP CHROME BORE. On the M16A1, the C MP B barrel was used from 1972-1973. In 1974, they started marking them C MP CHROME BORE and were done so until 1982. Now, the same should hold true for the SP1s. Any SP1 made after 1973 should have a C MP CHROME BORE marked barrel, but Colt has been known to do funky things. In your case, it could be an earlier upper assembly on a later lower. That could explain the discrepancy. This would also mean that the SP1 is not in it's original configuration.
2/11/2017 7:24:01 PM EDT
[#4]
My wife's 55K SP1 (1976) is marked C MP Chrome Bore.
2/11/2017 7:28:38 PM EDT
[#5]
Carbine or Rifle?  If carbine, that may be correct as the earlier ones were C MP B marked.
2/11/2017 7:53:25 PM EDT
[#6]
Early 653 barrels were marked C MP B, the B meaning chrome Bore, and they were 1/12., but starting in 1974 653 chrome bores were marked C MP CHROME BORE. The SP1 carbines may very well have used these as well. That said, I have a 1981 SP1 carbine (SP 149XXX) and it has the C MP CHROME BORE barrel.
2/11/2017 8:57:33 PM EDT
[#7]
The SP1 I'm looking at is a Carbine not a rifle, from the responses I have gotten it sounds like the barrel is not correct or this year carbine.
Thank you all for your responses.

Bill
2/11/2017 9:38:12 PM EDT
[#8]
Quote History
Quoted:
The SP1 I'm looking at is a Carbine not a rifle, from the responses I have gotten it sounds like the barrel is not correct or this year carbine.
Thank you all for your responses.

Bill
View Quote


I believe it's correct.  I have several early sp1 carbines with C MP B barrels which are closer to yours in serial.
2/11/2017 10:42:04 PM EDT
[#9]
yeah, with a carbine that's a different deal.
I'd bet on original just because who would go to the trouble of replacing a C MP Chrome Bore with a harder to find barrel?
choot it and giggle.
2/11/2017 11:46:07 PM EDT
[#10]
Rather than start a new thread, thought I'd jump in here with a barrel marking question of my own.

I have a SP1, 1977, serial 68xxx. The barrel is marked C MP CHROME BORE. According to what I understand from retroblackrifle.com all markings and parts on the remainder of the rifle (trapdoor buttstock, birdcage flash hider, 20" barrel, triangular handguards, etc) make it a R6000.

According to retroblackrifle.com if it is a R6000 it should have a "12" an inch from the flash hider.

This rifle does not. Is this "12" in fact a required marking for a R6000?

Mine is a rifle by the way.
2/12/2017 12:15:37 AM EDT
[#11]
The "12" was only used on VP, M VP and early MP marked barrels.  The "12" was never used on CMP C, CMP B, and CMP CHROME BORE barrels.
2/12/2017 12:51:40 AM EDT
[#12]
Great! Thanks for clearing that up. That was the last marking that needed confirmation. This is an all correct, unfired rifle. Never thought I'd get this lucky. A friend of mine was given the rifle by another friend's widow. He's selling it to me for $900.00. I really want to keep it, but have been wanting an all correct pre-1946 1911A1 for a long time. Not that interested in the SP1s.
2/12/2017 2:40:34 PM EDT
[#13]
Since we have determined the barrel is probably correct for this rifle what should I consider paying for an SP1 Carbine? Its in very good condition low round count and comes with a Colt 3X Scope.
Thanks for all the responses.
Bill
2/12/2017 4:02:48 PM EDT
[#14]
Quote History
Quoted:
Since we have determined the barrel is probably correct for this rifle what should I consider paying for an SP1 Carbine? Its in very good condition low round count and comes with a Colt 3X Scope.
Thanks for all the responses.
Bill
View Quote


The barrel may be correct, but may not be original to that lower. The R6001/SP1 carbine was released in 1977 and run up through 1982. According to retroblackrifle, the earlier versions had a C MP B marked barrel and the later ones had C MP CHROME BORE marked barrels. There is no way to know what they consider "early" and "late", nor what barrel this one came with without having to pay Colt for the documentation and even then, it may not show how the barrel was marked. If there is documemtation to prove it is all original, if it comes with the original accessory pack, and if the Colt 3x20 scope is original and not a cheap knock-off, then it could be worth a considerable amount. SP1 carbines have a really strong book value, but market value is another thing all together. That is determined by what someone is willing to sell for and what someone is willing to pay. When I got my 1981 SP1 Carbine a couple years ago, I paid $1800 for it and it was well worth it. It did not come with anything, but it is in great condition. The book value was almost $2500 at the time. I have no idea as to what book value is now. Market value fluctuates. It is a softer market now than what it was a couple years ago. Value on original Colt 3x20 scopes can vary depending on whether it has everything with it or not. I have seen just the scope (no lens covers or box) listed for around $280-$350. There are reproductions, so be careful. Again, as far as what you should consider paying for the entire setup, that depends on what you are comfortable paying. Quite frankly, I would try to get it for somewhere around $1500 or less if you can. If not, I would not go any higher than $1800.

BTW, this is my 1981 SP1 Carbine.

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2/13/2017 8:57:50 AM EDT
[#15]
Well I waited to long to pull the trigger and it was sold so I'm in the market for a nice  SP1 if you know of one available please let me know.
Bill
2/15/2017 3:29:08 PM EDT
[#16]
How many times does one have to say it's correct in this thread!

I have a 1978 manufacture SP1 carbine with a CMPB marked barrel - 100% correct and original.  Early SP1 CARBINES  were marked CMP B - period.   Now my 1978 SP1 Rifle does in fact have the full Chrome Bore markings, but not the carbine.

And OP, you are talking a steal there.  Mine is mint - I paid well over $2k for mine and I would not trade it for a WW2 1911.

Earl
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