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scottryan
07-13-09, 12:05
I picked this up off of gunbroker. I've finnally been stumped and cant figure this out by myself.

The barrel is 15.5" long, not 16". It appears to never have been cut down.

The contour under the handguards tapers from about .770 to about .720.

The stamping on the barrel is very "Colt like" but is marked BCMP 5.56 NATO 1/9.

The machine work on the barrel and fitment of the front sight base is also very Colt like

The handguard cap is more rounded than a Colt.

It has a A2 flash hider with wrench flats off at a 45 degree angle as found on early 1990s Colts.

The sling swivel rivet is going the wrong way for a Colt.

The upper receiver is aftermarket with some bronze tint.

What do you guys think?

http://www.hunt101.com/data/500/medium/DSC003832.JPG
http://www.hunt101.com/data/500/medium/DSC003842.JPG
http://www.hunt101.com/data/500/medium/DSC00381.JPG
http://www.hunt101.com/data/500/medium/DSC003862.JPG
http://www.hunt101.com/data/500/medium/DSC003871.JPG
markm
07-13-09, 12:11
Tag for this one.
mvician
07-13-09, 16:15
Scotty,

Can only find one reference as you probably have in the archives on TOS.
http://www.ar15.com/archive/topic.html?b=3&f=4&t=205538

Thread ended without any solid info.
Caeser25
07-13-09, 17:22
Bushmaster ? Is the flash hider pinned and welded? If not you might wanna get that fixed ASAP and edit your post ;)
scottryan
07-13-09, 23:44
Bushmaster ? Is the flash hider pinned and welded? If not you might wanna get that fixed ASAP and edit your post ;)


No it is not welded and why would I edit my post?
Iraqgunz
07-14-09, 01:40
Because you have an evil "constructive intent" upper and the BATFE is headed down your street. :D


No it is not welded and why would I edit my post?
markm
07-14-09, 08:37
Bushmaster ?

That was my first guess, but Bushmaster is typically marked B MP.... without the "C"
ST911
07-14-09, 09:44
The upper receiver on one of my 6520s (8/06-Hartford) is devoid of any markings. Can't say it has a bronze tint, though.

Is the barrel a recontour, maybe?
Iraqgunz
07-14-09, 10:28
scotty,

Maybe you could email Bushmaster and ask them if is something that they made for a special run of guns? I can honestly say that I have never seen that marking before.
RAM Engineer
07-14-09, 14:03
I can almost smell the oil when I look at those pictures.
CLHC
07-14-09, 14:21
Saw this particular "dated" online site:

http://www.biggerhammer.net/ar15/barrelsbolts/
scottryan
07-15-09, 01:27
scotty,

Maybe you could email Bushmaster and ask them if is something that they made for a special run of guns? I can honestly say that I have never seen that marking before.


I searched the archives on TOS and found two references to this barrel.

Another guy had asked the same question as me but he never got any answer.

Another speculations is this is the mythical Bushmaster carbines that were made for Gulf War I.

However, I do know. The markings and machine work on this barrel are closer to that of a Colt than a Bushmaster.
OldNavyGuy
07-15-09, 10:00
The barrel is 15.5" long, not 16". It appears to never have been cut down.

are you measuring it properly ?

as in closed and locked bolt, use a cleaning rod, insert it till it makes contact with bolt, mark the rod at the very end of flash hider of the protruded rod, remove rod and measure from tip to mark, that is your barrel length.
markm
07-15-09, 10:08
are you measuring it properly ?

Prepare to be Slut Slapped! :eek:
scottryan
07-15-09, 12:54
are you measuring it properly ?




Yes.

It is clearly shorter than a 16" barrel.

I could tell this in the gunbroker auction just by looking at the pictures and is one of the reasons why I bought it.
scottryan
07-15-09, 13:35
are you measuring it properly ?



I have added another picture in the OP (first picture) that clearly shows the barrel is less than 16"
markm
07-15-09, 13:37
Is it unfired?
scottryan
07-15-09, 21:57
Is it unfired?



It has been fired but is like new. Next to no finish wear. No rust.

It has a scratch on the bottom of the barrel under the FSB.

TE reading on my .224 gauge is just about 0.

The upper receiver it is attached to has more wear on the inside from use. I would say the upper receiver has about 1000 to 1500 rounds on it.

It also came with a pair of regular Colt carbine handgaurds which were like new and a JC (the USGI contractor, non JP) bolt carrier that has been milled back to semi auto config.

The barrel has non extended feedramps.
armakraut
07-16-09, 00:12
The only barrels around that length that I have heard of were the UK's L119A1 (Deimaco C8SFW). 15.8 inches.

Possibly the barrel was cut down due to some damage to the original threads?
scottryan
07-16-09, 00:18
Possibly the barrel was cut down due to some damage to the original threads?


No, because the small step up behind the flash hider has not been messed with.

The barrel markings would also be removed on the end if the barrel was modified.

If you look at this barrel and look at a Colt 6721 barrel, the markings are in the same position relative to the end of the barrel.
armakraut
07-16-09, 00:54
Are you planning on doing anything with it?
ranger216
07-16-09, 02:00
could it be a Bravo Company custom?
Parabellum9x19mm
07-16-09, 02:14
doubtful.

BCMs are marked "HP MP 1/7 5.56 NATO"
Robb Jensen
07-16-09, 07:16
I have no idea but I'm guessing Israeli, Canadian or British made. Probably from somewhere that doesn't have NFA laws like the U.S.
scottryan
07-16-09, 09:57
Are you planning on doing anything with it?


I'm just going to keep it and not use it.