Please click here to visit the "Military Carbine Components Guide" for
additional info and photos of the various components used on this model.
HISTORY / BACKGROUND:
The Colt Model 607 was the first attempt to produce a "True Carbine" which had both a reduced barrel
length and collapsing buttstock. The 607 Models included; the 607 with 3-Way Fire Control Group
(Safe, Semi, Auto), the 607A with 3-Way Fire Control Group (Safe, Semi, Auto) the 607B with 3-Way Fire
Control Group (Safe, Semi, Burst). The model 607 used modified AR15/M16 furniture to include a
modified buttstock which allowed it to be extended or collapsed, as well as a shortened pistol grip and
shortened triangular handguards. The Model 607 had very limited production numbers and saw very
minimal use in the field by US Military Forces during Vietnam. There was a "Military Version" of the 607
which was given the designation of GX-5857. The exact details on this version are unknown at this
time.
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BUTTSTOCK
STYLE:
1st Generation Collapsing

MATERIAL:
Modified A1 Rifle Buttstock



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BUFFER GROUP:
BUFFER:
Standard Carbine Buffer

SPRING:
Standard Carbine Spring

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LOWER RECEIVER:
STYLE:
"Partial Fence"


MARKINGS:
As Pictured


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UPPER RECEIVER:
* SEE NOTES BELOW

PROOF MARKS / FORGE CODE:
Colt Proof Marks - Triangle & Square with "C"
Located in front of ejection port
No Forge Code

REAR SIGHT:
Raised Directional Markings on Receiver

EJECTION PORT COVER:
"Later" with " Rectangular Plate"
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BOLT GROUP:
CARRIER:



BOLT:



FIRING PIN:
Improved Light Flat Head


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CHARGING HANDLE:
Current Improved Design







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HANDGUARD SLIP RING:
Flat





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BARREL:
DIAMETER:
0.625" at the Front Sight Base

LENGTH:
10"

TWIST RATE:
1/12

MARKINGS:


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HANDGUARDS:
Modified and Shortened
Triangular Handguards


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FRONT SIGHT BASE:
STYLE:
Both a Cast and Forged FSB
Could have been found

MARKINGS:
None



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FLASHHIDER:
3.5" Moderator



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                              ADDITIONAL COLT MODEL 607 INFORMATION
RETRO BLACK RIFLE - CARBINE GUIDE - MODEL 607
Colt Model 605
.223 Cal / 5.56mm
MILITARY CARBINE
GUIDE
Colt Model 607
Colt Model 608
Colt Model 609
XM177E1
Colt Model 610
XM177
Colt Model 619
& 620
Colt Model 629
XM177E2
Colt Model 630
USAF GAU-5A
Colt Model 639
Colt Model 649
USAF GAU-5A/A
Colt Model 651
& 652
Colt Model 653
& 654
Military Carbine
Components Guide
US Air Force
Carbine Guide
Unknown Date - Vietnam
USN SEAL Team Weapons
(3rd from top Model 607
Unknown Date - Vietnam
USN SEAL Team Conducting "Prisoner Snatch"
(left SEAL Model 607)
Unknown Date - Vietnam
USN SEAL Team on Patrol
(very top is the front half of a Model 607)
Unknown Details
USN SEAL Team Conducting "Press Briefing"
(closest to bottom Model 607)
Colt Model 607 Upper Variations
The Colt Model 607 was built using both a Standard Slickside Upper, and a
Standard Forward Assist Upper. The use of these Uppers seems to be
relatively equal in numbers.
Standard Slickside Upper
Standard Forward Assist Upper
Colt Model 607 - Flashhider Variations
The Colt Model 607 was most commonly found with a 3.5" Moderator,
however as the photos above show it could have also been found with a  
3 Prong Flashhider and 4.5" Moderator.
PROPERTY
OF US GOVT
GX-5857
CAL 5.56 MM
SERIAL 014607
Colt Model 607 - GX5857
setstats