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 609 was the first Colt Carbine to see wide scale production and use by US Military
Forces. The Colt Model 609 entered US Military Service with the US Army and was given the
designation of XM177E1. The Model 609 went into production in late 1966, and continued production
until early 1967.  The 10" barrel on the Model 609 would prove to be an undesirable length due to
function reliability and accuracy issues, and it would later be replaced with the Colt Model 629 /
XM177E2 which was basically the same Carbine with a 11.5" barrel.
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BUTTSTOCK:
STYLE:
2nd Generation Collapsing Stock

MATERIAL:
Aluminum Body coated with Vinyl-Acetate


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BUFFER GROUP:
BUFFER:
Standard Carbine Buffer

SPRING:
Standard Carbine Spring

TUBE:
2-Position Tube

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LOWER RECEIVER:
STYLE:
Early - Partial Fence


Late - Full Fence


MARKINGS:









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UPPER RECEIVER:
PROOF MARKS / FORGE CODE:
Colt Proof Marks in front of the Ejection Port Cover




REAR SIGHT:
Standard "Late Production" A1 Sight




EJECTION PORT COVER:
"Late A1 Production" Type




FORWARD ASSIST:
"Original" Tear Drop Assist




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BOLT GROUP:
Standard Colt Bolt Group
Unmarked Bolt Carrier
"MP" marked Bolt

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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:
Carbine Handguard
with Single Heat Shield




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FLASHHIDER:
4.5" Moderator




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COLT MODEL 609 / US ARMY XM177E1  - "IN THE FIELD"
RETRO BLACK RIFLE - CARBINE GUIDE - MODEL 609
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
US Army
Early Model 609 with Partial Fence Lower
Unknown Date - Vietnam
US Army LRRP/Ranger with Late Model 609
Unknown Date - Vietnam
US Army Air Cav - Capt Hugh Mills
Unknown Date - Vietnam
US Army LRRP/Ranger
Late Model 609 with Full Fence Lower
Unknown Date - Vietnam
US Army with Early Model 609
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