HISTORY / BACKGROUND:
Along with the Colt Model 609, the Colt Model 610 was the first Colt Carbine to see wide scale
production and use by US Military Forces. The Colt Model 610 entered US Military Service with the US
Air Force and was given the designation of XM177. The primary difference between the Model 609 and
610 was the presence of a Forward Assist on the 609 and the lack of a Forward Assist on the 610. The
Colt Model 610 was also later given the USAF designation of GAU-5A.
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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:
Partial 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:
NO Forward Assist
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BOLT GROUP:
Standard Colt Bolt Group
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HANDGUARD SLIP RING:
Delta / Tapered
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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 610 - "IN THE FIELD"
RETRO BLACK RIFLE - CARBINE GUIDE - MODEL 610
.223 Cal / 5.56mm MILITARY CARBINE GUIDE
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1992 - Security Police, Operation Desert Shield / Storm
Carbines on the left are GAU-5/A - Colt Model 609 (over 20 yrs old) Carbines on the right are GAU-5P - a USAF Carbine or M16 rebuilt with a 14.5" barrel
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1992 - Security Police, Operation Desert Shield / Storm
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