Colt M4 Carbine Sporter SP6920 AR-15 5.56 / .223 16″ Semi-Auto Rifle
SOLD FOR: $950
WOA#: WY231005AB021
Make: Colt
Model: M4 Carbine
Serial Number: SP512832
Year of Manufacture: Modern
Caliber: 5.56 / .223
Action Type: Semi-Automatic, Direct Impingement
Markings: Left side of the lower receiver marked with rampant Colt logo and below that is marked “M4 CARBINE / CAL. 5.56MM / SER. SP 512832”. Behind the safety switch is stamped “COLT’S MFG. CO. LLC / HARTFORD, CONN. / -U.S.A.-”, along with “SAFE” and “FIRE”. Top of the barrel is marked “C MP 5.56 NATO 1/7”. Right side of the lower receiver is marked “SAFE” and “FIRE”. The right side of the charging handle housing is marked with a “C” and Keyhole Forge Mark. The right side of the lower has a Keyhole Forge Mark. The left side of the Carrier is marked “C” and the neck of the bolt head is marked “MPC”. The muzzle brake is a marked “SUREFIRE LLC SURECOMP-556-½-28” and “NSN 1005-01-646-9074”. The buttstock is marked “ROGERSSUPERSTOC / www.super-stoc.com” and “COLT DEFENSE / PATENT PENDING”. The right side of the gas block is marked “<R>1”.
Barrel Length: 16”. 18.25” Surefire Warcomp Muzzle Break.
Sights / Optics: The front sight is A2-style post and the rear sight is flip up Magpul Back-up Sight MBUS on top of the flat top picatinny upper receiver.
Stock Configuration & Condition: The buttstock is a collapsible Rogers Super Stoc with rubber buttpad, sling slot, and ambi QD mounts. The pistol grip is an A1 style grip. The handguard is a 12.5” MLOK rail with cutout in the top for the carbine length Gas Block / A2 sight. The receiver has forward assist, dust cover, and case deflector. The LOP measures 14.25” from the front of the trigger to the back of the buttpad at full extension. The stock rates in about Very Good overall condition. There are no chips or cracks. The checkering on the grip is moderately dulled. There is some moderate handling wear.
Magazine Quantity & Condition: One 30rd PMAG in Excellent condition.
Type of Finish: FDE Cerakote
Finish Originality: Original
Bore Condition: The bore is bright and the rifling is sharp. There is no visible erosion in the bore.
Overall Condition: This rifle retains about 97% of its metal finish. The balance of the finish shows some finish loss edge of the case deflector and forward assist. Overall, this rifle rates in about Very Good condition. Please see photos for a better understanding of this rifle’s condition.
Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: None.
Our Assessment: The Colt SP6920 is a civilian variant of the Colt M4 Carbine, one of the most widely used and battle-tested firearms in the world. It’s manufactured by Colt Defense, a name that has been synonymous with quality and reliability in firearms since the 19th century. The SP6920 comes chambered in 5.56 NATO, featuring a 16.1-inch chrome-lined barrel that offers both durability and accuracy.
One of the standout features of the SP6920 is its attention to detail in replicating many of the features found on its military counterpart. Its direct gas impingement operating system stays true to the original design, offering a proven mechanism that’s both simple and effective. It comes with a bayonet lug and this particular build has an excellent Warcomp 556 muzzle brake.
Whether you’re in the market for home defense, sporting, or even formal competition, the Colt SP6920 offers a blend of versatility and performance. It combines the ruggedness and reliability that Colt is known for with the modularity inherent to the AR-15 platform. The result is a firearm that not only honors its heritage but also meets the needs of modern shooters. Please see our photos and good luck on your bid! – L.S.
