Any idea on the build date from the serial#?

Originally Posted By Silkywilson: Any idea on the build date from the serial#?

Going by the top post of this thread, it appears that the 122XXX serial number dates from 1980.

I'll add my SP1 to the list #0047x should be a 1964 model. 3 prong flash hider with bayonet lug. I've been told it has the Mattel stock and triangular forend. It is in great condition.
I'll have to review other post to get the nitty gritty on all the markings and parts for the list.
Ken-TN

#28839 FSP marked "C", barrel marked CMP B

What can you guys tell me about this SP1 Carbine.

S/N SP1466XX
Marked AR15 Colt Firearms Division Colt Industries
No Forward assist but has grooves in bolt carrier. bolt carrier marked "c"
2 position Collapsible Stock (metal)
A1 handle
CM Forging
16 inch Barrel Birdcage style flashhider
Barrel marked C  MP Chrome Bore
Riveted Front swivel
no shell deflector
cal. 223
Large slotted front pin

Also, when the bolt is locked open and you tap the buttstock (when its closed) the bolt will go into battery. Is this normal for this rifle because it is in very good condition and nothing looks to be worn.

Looking for a build date and approximate value.

Let me know if any more info is needed I have the rifle here.  

I just bought a 1977 Colt SP1 (s/n: SP759XX) from an older gentleman at a local gun show this morning. The SP1 is in fantastic condition. The lower had a light scratch on the right side, but I managed fix that in about 30 seconds. The BCG and CH have hardly any wear whatsoever. They look almost new. Bolt is "MPC" marked and carrier is "C" marked. Carrying handle is marked with the "C" and "M". Barrel is marked "C MP CHROME BORE". FSB has "C" marking as well. It came with one Colt AR-15 CAL .223 magazine. It too is in really good condition. I am most pleased. Price was really reasonable too.

I saw an SP1 at a gunshow over the weekend.  It was nice but well used.  The serial was 73xxx and the guy said it was a 1977 as the table here suggests as well.  The strange thing about it is it is a CH forge code slickside upper.  There are not many CH on the list here at all.  It was a plain jane 20" SP1 barrel was C MP Chrome Bore marked with a birdcage.  The upper and lower color matched very well.  I don't recall whether it was Patent marked or Firearms Division marked.  It appeared original and the kid said it was his uncle's since new.

Sweet Sp1's Yall Got There...Check Mine Out!!!!!

Here is a few Photo's of my 1973 Colt AR15 SP1....All is Orginal nothing has been changed out on this Baby!!!!!!  and in Mint Condition.I have suited it with a Colt Orginal 4x20 Scope.Tell me what Ya think of Her!!!

http://i294.photobucket.com/albums/mm108/curtwear/100_0446.jpg

http://i294.photobucket.com/albums/mm108/curtwear/100_0440.jpg

http://i294.photobucket.com/albums/mm108/curtwear/100_0444.jpg

http://i294.photobucket.com/albums/mm108/curtwear/100_0449.jpg

http://i294.photobucket.com/albums/mm108/curtwear/100_0450.jpg

SWEET!!!

Man I love this site.
I need information and this is the first stickie

Old man walked into the local gunshop with a SP1 for a consignment sale this morning.

First one I have ever handled.

20 inch barrel with birdcage.

A1 stye rear sight.

trapdoor on buttstock.

no forward assist.

#227xx

I dont think it was very high mileage, but it had been shot.
Someone want to give a rough idea of value at 85%.
I dont need it, but I am interested

Can i get my 1965 colt sp1 on the list if so here are the specs ser# 46xx

20'' a1 barrel w/improved 3 prong flash hider marked m and vp in a triangle between the fsb legs and s 12 about an inch from the flash hider

It has the old style gas tube.

The upper is a no fa upper with 601 sight screw and no markings in the corner under the sight. But it has the proof marks by the door.

The bolt carrier is a slick sided sp1 carrier the bolt is a chromed mp marked bolt w/ old style retaining pin and firing pin.

The fcg is modded m16 parts the selector is a safe and semi "601'' style

The lower is a no fence lower with a raised + on the magwell. It also has a roll pin holding the buffer tube in place. The buffer is a edge water buffer


Thanks

I recently acquired an SP1 that had been in the family for many years.

The serial # is 1828XX.

Trapdoor stock
Incorrect? round FHG
Incorrect aftermarket pistol grip

A colt rep. told me it was a 1982 build.

I'm still compiling research and trying to learn about it.

I will include a link to a photobucket slideshow that has all the pictures of it I've taken so far. There are some pics of other guns of mine in there also, just ignore them or enjoy them.


s276.photobucket.com/albums/kk29/TurboRegal87/?albumview=slideshow


Thanks,
Jeff

I am new to the world of assault rifles. I just recently purchased a Colt AR-15. The serial number is SP1317XX. I was wondering if anyone could tell me the year of manufacture of this rifle. Thanks alot


ps. Also, does anyone know what its worth? It is in great shape, very clean, very well maintained. I just want to make sure I didnt get ripped off. again, thanks alot.

#2024XX

ColtGuard Finished/electraless nickel finish

round chrome auto bolt carrier is cut for forward assist but non assisted rifle

Trapdoor butt stock

Colts firearms division

CMP chrome bore   stamped barrel

Bird cage

should you need any other questions answered I will do.

I heve an SP1 sr#167xxxall colt parts 3 prong f.h. the barrel is marked C MP B what does this stand for colt magna fluxed ? Please let me know. Please send me an IM if you know for sure. Thank You.

http://i297.photobucket.com/albums/mm237/thefryzone/P1010002.jpg

I am looking at an SP1 and was wondering if some one can give me an idea of the year of manufacture?

SP2008XX

Any help would be greatly appreciated!

Here is my SP1:

Serial number - 1120XX

The upper receiver is a slick side. It has a C M forging, a small faint square with a C and a triangle is visible forward of the ejection port. The ejection port cover has the rectangular detent. It also has the small R and arrow for the sight directions.

The barrel is marked C MP CHROME BORE the chamber appears to be chrome plated and has an A1 bird cage flash suppressor.

Front sight has a diamond with a B4 in it.

The bolt is grey/black finished and is marked MP C and no markings on the extractor.

The AR-15 bolt carrier is grey/black finished and has forward assist notches. The carrier is marked with a C. The screws on the gas key are staked from the sides.

The firing pin looks like a standard AR15 type.

The charging handle is grey with three notches on the latch.

The buttstock is the trap door type without a drain hole screw. The rear sling swivel is a non swivel style. It also has the original cleaning kit still inside of it.

The buffer has a dimple in the middle of the face and a non-pinned tube.

The lower receiver pins and selector are the non-dimpled type and has touch up paint on mag release roll pin area.

The hammer has a 3 inside of a circle and a C inside of a circle along with a notch on top. It also has a bobbed disconnector.

The front sling swivel is plastic coated and is connected to the FSB by a rivet.

The sling is black cotton canvas with black slide keeper and black buckle.

The pistol grip has a C and an A inside of it.

Handguards, buttstock and pistol grip have a flat non reflective finish that is slightly textured.

I actually bought this rifle from Phessor in December 2007, and it is a beaut. A call to Colt's office confirmed it was built in Aug/Sept. 1979. (I thought it was 1980, based on the s/n and the current data base but it seems like the data base is a basic range, not exact as to when the gun was actually built by Colt.)

This rifle has shot a couple of REAL 1/2" groups, 5 shots at 50 yards with the factory open sights, using Rem. UMC 55 grain FMC.  Three of the rounds were touching/overlapped. I only had 20 rounds with me, but I left the range with a smile you couldn't grind off my face! hool
Jeff
GlockRocket34

Hope this adds to the data base.

1964 manufacture.  Edgewater buffer, MP marked chrome bolt, barrel marked with a "12" underneath.

Non chromed bore, original one piece firing pin retainer.

I'm pretty happy......  

Just picked up this rifle.

SP1 Carbine Serial number SP1420XX

Coated 2pos col. stock, lock ring had factory stakes (2) and had black paint on them.

Bolt carrier has "C" mark and forward assist notches. Unmarked extractor with white insert. No mark on bolt. Bolt has short full circle in back and has unshrouded firing pin.

Disconnector has "C" stamped Hammer and trigger have a C in a circle on them and an S stamped on them. Hammer is notched

Lower is marked COLT FIREARMS DIVISON
                       COLT INDUSTRIES
                       HARTFORD, CONN
                              USA
Black factory paint on bolt catch roll pin hole.  C and M on carry handle. Triangle and a c in a square in front and above ejection port.

No marks on barrel under the handguards. No marks on the rough finished front site . Rubber coated riveted front sling swivel. C MP   CHROME BORE  on top of barrel. A1 flash hider with split lock ring.

626XX here
CMP Chrome Bore bbl marking
AR15 bolt carrier w/serrations "C" marked
Bolt Marked at "MPC"
COLT'S PATENT FIREARMS MFG CO
AR15 FCG- No M16 parts
Birdcage A1 flash Suppressor
Upper has forge codes as C K
Trap door buttstock

SP-42950

Sold it off many yesrs ago - had birdcage and trap door buttstock.

SER SP1254xx

C M forging marks on upper receiver back by rear sight, with a very faint C in a small square toward the front end.  There is not a Colt Verified Proof arrow.  It does have the small splash of black paint on the bolt catch pin.

The barrel is marked C MP CHROME BORE.  A1 flash suppressor.  There are no marks on the front sight tower (other than UP and the arrow for sight adjustment) or on the barrel between the barrel bands of the sight tower.

The bolt  and carrier are both black.  The carrier is marked C and the key screws are double staked on the outsides.  It does have the forward assist notches.  The bolt is marked C MP.  The charging handle is blacker than the receiver halves.

Trap-door butt stock.  The stock, handguards and pistol grip are black matte finish.

I bought this rifle used in late 1984 or early 85 as a going away present to myself upon the ex-wife's departure, but did not receive a sling or cleaning equipment.  The rifle has stuck around longer, and proven to be more dependable, than she was, but that's another story.  It came with several 20-round magazines, some of which were Colt but I can't say if any of them were original or exactly how they were marked except they all had the GI metal followers.

Very proud to say I paid the pricely sum of $450 for the rifle, a nice gun bag, half a dozen magazines and a couple hundred rounds of GI ball ammo.  Should have bought a few more at that kinda prices  

Are any of the SP1's models equipped with a forward assist?  If so what year did Colt start making them?

I purchased my SP1 in 1973 it probably got 10000 plus rounds through it and I took it out last night and off the bench rapid fire with a red dot it'll put most of the rounds into a 5" circle at 200 yards.

Great shooter and I'm using it for yote hunting this year.

Turk

Only 51 away from mine.

Very informative as well as articulate.I personally don't understand the recent trend/fad whatever of the previous early sp1 interest.I was under the impression they had quite a few teething problems,due to a number of reasons one of which was the 1 in 12 twist,as well as training from the M14,ammo etc.If someone could take the time to explain the recent popular intrest please explain.Thanks Joe

117544 CM forge code, A1 birdcage FH, Barrel marked "C MP Chrome Bore", "C" marked FSB, "C" marked AR carrier, "C" stamped ejector with white insert, "MPC" marked bolt, bobbed disconnector, factory touch up paint on bolt release roll pin area.

I have been doing some research on this upper I bought a few years ago and haven't been able to find anything on these reciever markings. Any help would be appreciated.
http://i36.photobucket.com/albums/e35/rsvmille00/DSCF0814.jpg
http://i36.photobucket.com/albums/e35/rsvmille00/DSCF0816.jpg
http://i36.photobucket.com/albums/e35/rsvmille00/DSCF0820.jpg
http://i36.photobucket.com/albums/e35/rsvmille00/DSCF0822.jpg

This followed me home yesterday and I'm sure as hell keeping it.  SN 1919xx and it looks like it has a very, very low round count, judging by the wear on the BC.  All original configuration.

Barrel is marked "CMP CHROME BORE".  There's a "B" in a diamond on the FSB.  C M marks on the carry handle.  The BC has the forward assist cuts and is marked "C" on the left side of the carrier.  Extractor has the white insert.  Has the birdcage flash hider.

Rollmark:


Carry handle:


FSB:


Barrel:


Hammer; looks like a "C" with a sideways "P" inside:


Bolt carrier:

Your upper has all the same markings mine does.
My buddy just brought it to last night and I am trying to find out what it is.
Can you tell me anything about it?
This one also has triangle hand guards.

Is the list on the front page still being updated?

#1615XX    16" Extra Light contour barrel labled "C MP CHROME BORE"

SP 3560X
Rifle, no forward assist no brass deflector. Rollmarked "COLT'S PATENT FIREARMS MFG.CO HARTFORD. CONN."
Trapdoor buttstock
A1 Birdcage FH w/lock washer
Barrel marked "C MP B"
Bolt carrier is full circle, slotted for forward assist and marked with a "C"
No forge marks
Bolt marked "MPC"
FSB marked with a "C" and a bell
I bought the rifle with round handguards on it which have now been replaced with triangle handguards. It was traded by it's original owner to a local shop. Best guess as to year of manufacture is 1975/1976. Came with a Colt 3x scope

can I get some more information on that barrel?  I recently acquired an SP1 Carbine, and the barrel looks just like that with the flash suppressor, but it isnt threaded on.  it slips on and is welded around the muzzle crown inside the suppressor.  Is that barrel 16", or shorter with a 5" flash suppressor on it?

I bought my SP1 about 10 years ago, lot of use but it runs flawlessly.  s/n is SP1  43510 which from my research makes it a 1974, but the front page of the thread indicated 1975.

When I got it it was a carbine with the coated aluminum colapsible stock, A1 upper, skinny 16" barrel, flat-side receiver but it does have fwd assist gizmo.  The barrel had a heavy flash-hider thing about 4" long, I replaced this with an A1 flash-hider.

My question is: Was this born a carbine?  or did someone convert it from a 20" rifle way back when?

Hi,
As you can see, new member. Have searched thru the forums and this seems to be the place to ask.
Bought a new Colt SP1 carbine in the 80s. The only firearm in the house I can't find the receipt for. Any help on DOB etc would be appreciated.
SP1 Carbine SN SP1669xx. Normal config with sliding stock, FA notches on bolt, birdcage suppressor. Big hammer(I think) showed it as Pre-ban, but I already know that cause there was no ban when I bought it new.

Not sure if you are saying the first number is a 1 or a 6
If we go by the first page of this thread your serial number SP1-1669xx it is a 1982 production carbine.  If the s/n is SP1- 669xx then it is a 1974 production.

Remember, the serial number starts with an SP, not SP1.  If your serial is SP143510 then you have a later 6 digit SP1.  If so, and the stock/receiver ext nut is still origianally staked and coated, then theres a good chance it was originally a carbine.

Otherwise, if the serial is SP43510 then it started life as a 20" rifle.

Thanks,
The  SN  is SP  1669xx and as I said it's a model SP1 carbine.
Appreciale the help.

I bought my little Carbine new in 1981 SN SP 1422xx.  I know this doesn't jive with the database, but I have a picure of me holding it in 1981.  The FSB has a C but I can't make out a bell anywhere.  16" Light barrel is marked C MP CHROME BORE right on the top.  A1 flash hider has nut flats at 1 and 7 o'clock as seen from the back––its never been off.  Rivetted front swivel.  Small C in a square forward of the ejection port and C and M under rear sight.  BC is marked with a C, has small rear non-FA tang and unshrouded firing pin.  Pin is silver with no coating.  Bolt says MPC.  Buffer tube is factory staked with a little black glossy paint on left side notch.  The black vinyl on the collapsing buttstock is peeling off a little on the butt plate.  Looks like poor prep of the aluminum underneath when the vinyl was applied.  I've never changed the front or rear sights and it shoots dead center at one hundred yards.  Was this luck or good factory setup in those days?

Every one I've ever seen was dead-on right out of the box.

Old Colt - Sounds like a nice carbine.  I have a 151xxx SP1 and confirmed through Colt that it left the factory in November, 1981.  If carbines and rifles used sequential serial numbers, which it appears they did, then 1981 seems to be correct for anything up to the high 150xxx's (or at least over 151xxx).

Serial # 357XX, no forward assist, Bolt is park and has assist cuts, lower receiver is slab/flat side no fence, sight has raised letters and arrow, flat slip ring, triangular hand guards, bird cage flash hider, trap door butt plate and only markings I can find are MP B on bottom of barrel near FSP

I put in lay away what appears to be an unfired Colt AR-15 serial number SP302XXX no forward assist, no shell deflector, barrel marked CMP 1/7 . Round front hand guard. Can anyone peg the year,Green label or Blue? Thanks ARN

I know this is an old thread,, but i've owned my SP1 for about 6 years now, it's in amazing condition... Serial # SP16625x

Barrel marked C M, no forward assist, trap door buttstock, it came with a birdcage flash hider (I'm not the first owner). I attained a three prong flash hider as well, wanting a "Vietnam" stlye M16 semi-auto clone.

What exactly was the army/marine issue Vietnam M16?

The SP1 I have is S\N SP519XX, slab sided, 6 slot flash hider.  Barrel stamped C MP chrome bore, FSB marked C with a triangle below.  No markings on upper, lower marked Colt Patent Firearms.

Ser # 88477: Colt's Firearms Division marked lower, factory touch-up paint in BHO roll pin area.  CM forge code on upper with boxed C and triangle proof stamps @ forward carry handle.  Forged FSB with very blurry C under front sight and riveted front sling swivel. Barrel stamped C MP CHROME BORE with birdcage flash hider.  Hammer stamped 2 in a C & circle C.  Buffer has 3 flats.  BCG is stamped C with forward assist cuts.  Two stakes per gas carrier screw, firing pin retainer is a cotter pin.  Bolt is marked MPC.





http://s103.photobucket.com/albums/m151/txarsoncop/SP1  If you're interested.



































On a somewhat related note could someone tell me why the BHO will no longer hold the bolt to the rear?  It appears to be fine, there is nothing restricting it from it's complete range of motion (as far as I can tell) and both the BHO and the BCG appear to be in good shape.?.  If I VERY carefully set the BCG to the rear it will hold but resetting the charging handle with cause the bolt to slam home.  Any ideas?  Pix below.













bill




 

I have SP1 164XXX. It has the 3 prong, triangle, no trap door, OD sling with metal ends.

Here is a pic of my 1973 Colt AR-15 SP1