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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BUTTSTOCK:
STYLE:
Later / Improved Solid Body



BUTTPLATE:
Solid Rubber



SWIVEL:
Pinned, Metal with
Plastic Covering


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BUFFER GROUP:
BUFFER:
"Original" Edgewater Design



SPRING:
Standard Rifle
Spring



TUBE:
Original Tube,
Without Wrench
Flats
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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

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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"
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BOLT GROUP:
CARRIER:
Chrome Slickside,
without Markings


BOLT:
Chrome


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:
15"

TWIST RATE:
1/12

MARKINGS:
Colt Proof Marks
Between FSB Legs
"12" marked under handguards
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HANDGUARDS:
Standard Rifle "A1"
Triangular Handguards,
Most likely without drain holes


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FRONT SIGHT BASE:
STYLE:
Cast

MARKINGS:
None



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FLASHHIDER:
Improved 3 Prong Flashhider



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                             ADDITIONAL COLT MODEL 605 INFORMATION
RETRO BLACK RIFLE - CARBINE GUIDE - MODEL 605
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
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)
setstats
Photo courtesy of tgus
Photo courtesy of tgus
Photo courtesy of tgus
Photo courtesy of tgus