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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