| 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 Model 605 was the first attempt by Colt to produce a "Carbine" style AR15/M16. The two
Models offered were the Model 605A which had a 3-Way Fire Control Group (Safe, Semi, Auto), and
the 605B which had a 4-Way Fire Control Group (Safe, Semi, Burst, Auto).The barrel was cutoff just
past the Front Sight Base, the Bayonet Lug was removed, and the Flashhider was reattached
giving the "Carbine" an overall length of approx 34 inches. This model was produced in very
limited numbers and never saw any wide scale use in the field by Military Forces due to its
unreliable operation.
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The Model 605 was the first attempt by Colt to produce a "Carbine" style AR15/M16. The two
Models offered were the Model 605A which had a 3-Way Fire Control Group (Safe, Semi, Auto), and
the 605B which had a 4-Way Fire Control Group (Safe, Semi, Burst, Auto).The barrel was cutoff just
past the Front Sight Base, the Bayonet Lug was removed, and the Flashhider was reattached
giving the "Carbine" an overall length of approx 34 inches. This model was produced in very
limited numbers and never saw any wide scale use in the field by Military Forces due to its
unreliable operation.
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BUTTSTOCK:
STYLE:
Later / Improved Solid Body
BUTTPLATE:
Solid Rubber
SWIVEL:
Pinned, Metal with
Plastic Covering
__________________________________________________________________________________________________
BUFFER GROUP:
BUFFER:
"Original" Edgewater Design
SPRING:
Standard Rifle
Spring
TUBE:
Original Tube,
Without Wrench
Flats
__________________________________________________________________________________________________
LOWER RECEIVER:
STYLE:
"Partial Fence"
MARKINGS:
Colt Logo
COLT AR-15
MOD. 05 (or MOD. 05B)
CAL.5.56 MM
SERIAL XXXXXX
SELECTOR:
Varied,
Both the Original Selector with
the Dimple/Divot, and the Later Style
could have been found
TAKEDOWN / PIVOT PINS:
Varied,
Both the Original Pins with
the Dimple/Divot, and the Later Style
could have been found
BOLT CATCH/RELEASE:
"Latter" with Raised/Grooved End
__________________________________________________________________________________________________
UPPER RECEIVER:
PROOF MARKS / FORGE CODE:
Colt Proof Marks - Triangle & Square with "C"
Located in front of ejection port
No Forge Code
*See below for additional information
REAR SIGHT:
Raised Directional Markings on Receiver
EJECTION PORT COVER:
"Later" with " Rectangular Plate"
__________________________________________________________________________________________________
BOLT GROUP:
CARRIER:
Chrome Slickside,
without Markings
BOLT:
Chrome
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:
15"
TWIST RATE:
1/12
MARKINGS:
Colt Proof Marks
Between FSB Legs
"12" marked under handguards
__________________________________________________________________________________________________
HANDGUARDS:
Standard Rifle "A1"
Triangular Handguards,
Most likely without drain holes
__________________________________________________________________________________________________
FRONT SIGHT BASE:
STYLE:
Cast
MARKINGS:
None
__________________________________________________________________________________________________
FLASHHIDER:
Improved 3 Prong Flashhider
_________________________________________________________________________________________________
ADDITIONAL COLT MODEL 605 INFORMATION
STYLE:
Later / Improved Solid Body
BUTTPLATE:
Solid Rubber
SWIVEL:
Pinned, Metal with
Plastic Covering
__________________________________________________________________________________________________
BUFFER GROUP:
BUFFER:
"Original" Edgewater Design
SPRING:
Standard Rifle
Spring
TUBE:
Original Tube,
Without Wrench
Flats
__________________________________________________________________________________________________
LOWER RECEIVER:
STYLE:
"Partial Fence"
MARKINGS:
Colt Logo
COLT AR-15
MOD. 05 (or MOD. 05B)
CAL.5.56 MM
SERIAL XXXXXX
SELECTOR:
Varied,
Both the Original Selector with
the Dimple/Divot, and the Later Style
could have been found
TAKEDOWN / PIVOT PINS:
Varied,
Both the Original Pins with
the Dimple/Divot, and the Later Style
could have been found
BOLT CATCH/RELEASE:
"Latter" with Raised/Grooved End
__________________________________________________________________________________________________
UPPER RECEIVER:
PROOF MARKS / FORGE CODE:
Colt Proof Marks - Triangle & Square with "C"
Located in front of ejection port
No Forge Code
*See below for additional information
REAR SIGHT:
Raised Directional Markings on Receiver
EJECTION PORT COVER:
"Later" with " Rectangular Plate"
__________________________________________________________________________________________________
BOLT GROUP:
CARRIER:
Chrome Slickside,
without Markings
BOLT:
Chrome
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:
15"
TWIST RATE:
1/12
MARKINGS:
Colt Proof Marks
Between FSB Legs
"12" marked under handguards
__________________________________________________________________________________________________
HANDGUARDS:
Standard Rifle "A1"
Triangular Handguards,
Most likely without drain holes
__________________________________________________________________________________________________
FRONT SIGHT BASE:
STYLE:
Cast
MARKINGS:
None
__________________________________________________________________________________________________
FLASHHIDER:
Improved 3 Prong Flashhider
_________________________________________________________________________________________________
ADDITIONAL COLT MODEL 605 INFORMATION
RETRO BLACK RIFLE - CARBINE GUIDE - MODEL 605
 | |  | |  | |  | |  | |  |
| .223 Cal / 5.56mm MILITARY CARBINE GUIDE |
| Colt "CAR Family" Catalog / Sales Photo |
| Colt Model 605 Upper Variations The Colt Model 605 was built using both a Standard Slickside Upper, and a Colt model 603 Upper which had the Forward Assist machined off leaving a raised hump on the receiver where the Forward Assist should have been |
| Standard Slickside Upper |
| Modified "603" Forward Assist Upper |
| A very rare photograph showing an early collection of USN SEAL weapons. To the very far right is a Colt Model 605 (circa 1964 - K. Dockery |
| Another very rare photograph showing USN SEAL Team 2 in the field training. 3 of the SEALs are equipped with Colt Model 601 Rifles, and the SEAL on the very far right is equipped with a Colt Model 605. (circa early 1960's - K. Dockery) |
Photo courtesy of tgus
Photo courtesy of tgus
Photo courtesy of tgus
Photo courtesy of tgus