| 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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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
STYLE:
1st Generation Collapsing
MATERIAL:
Modified A1 Rifle Buttstock
__________________________________________________________________________________________________
BUFFER GROUP:
BUFFER:
Standard Carbine Buffer
SPRING:
Standard Carbine Spring
__________________________________________________________________________________________________
LOWER RECEIVER:
STYLE:
"Partial Fence"
MARKINGS:
As Pictured
__________________________________________________________________________________________________
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"
__________________________________________________________________________________________________
BOLT GROUP:
CARRIER:
BOLT:
FIRING PIN:
Improved Light Flat Head
__________________________________________________________________________________________________
CHARGING HANDLE:
Current Improved Design
__________________________________________________________________________________________________
HANDGUARD SLIP RING:
Flat
__________________________________________________________________________________________________
BARREL:
DIAMETER:
0.625" at the Front Sight Base
LENGTH:
10"
TWIST RATE:
1/12
MARKINGS:
__________________________________________________________________________________________________
HANDGUARDS:
Modified and Shortened
Triangular Handguards
__________________________________________________________________________________________________
FRONT SIGHT BASE:
STYLE:
Both a Cast and Forged FSB
Could have been found
MARKINGS:
None
__________________________________________________________________________________________________
FLASHHIDER:
3.5" Moderator
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ADDITIONAL COLT MODEL 607 INFORMATION
RETRO BLACK RIFLE - CARBINE GUIDE - MODEL 607
 | |  | |  | |  | |  | |  |
| .223 Cal / 5.56mm MILITARY 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 |
