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AR15 Parts
Find everything you need to build, upgrade, or repair your AR-15 at ICB Firearms, located in St. Clair Shores, MI. We carry a full selection of AR parts, including barrels, buffer tubes, BCGs, charging handles, handguards, and trigger assemblies. Whether you’re upgrading your AR rifle for competition or outfitting a home defense build, we have you covered. Pair your components with AR magazines, gun scopes, and gear for the ultimate tactical setup. Be sure to browse the full rifle parts section for other compatible upgrades. Quality parts are essential for dependable performance, and our selection is designed for serious builders and shooters alike. Shop AR-15 parts today and start building with confidence.
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1 - 16 of 61788 posts
AR15 Uppers
CMMG 30B0E67AB Dissent MK4 300 Blackout 6.50″, Left
$166 offOriginal price was: $1,349.95.$1,183.99Current price is: $1,183.99.
AR15 Uppers
CMMG 55B8D86AB Dissent MK4 5.56x45mm NATO 10.50″, Left
$166 offOriginal price was: $1,349.95.$1,183.99Current price is: $1,183.99.
AR15 Uppers
CMMG 55BB40BAB Resolute MK4 5.56x45mm NATO 16.10″, Armor
$83 offOriginal price was: $560.00.$476.99Current price is: $476.99.
AR15 Lowers
CMMG 55CA102AB Mk4 Lower Receiver Stripped, Armor Black
$58 offOriginal price was: $174.95.$116.99Current price is: $116.99.
Small AR15 Parts
CMMG 55DA296 Mil-Spec
$1 offOriginal price was: $11.95.$10.99Current price is: $10.99.
AR15 Uppers
CMMG 57B40E4AB Resolute 5.7x28mm 16.10″, Armor Black, M-LOK
$123 offOriginal price was: $999.95.$876.99Current price is: $876.99.
Small AR15 Parts
CMMG AR-15 PARTS KIT FIELD REPAIR
$11 offOriginal price was: $39.95.$28.99Current price is: $28.99.
Other AR15 Accessories & Parts
CMMG AUTO SEAR TRIP KIT 22LR ANTI-BOUNCE WEIGHT
$5 offOriginal price was: $54.95.$49.99Current price is: $49.99.
AR15 Uppers
CMMG BANSHEE MK4 UPPER GROUP 4.6X30MM 8 BLK
$101 offOriginal price was: $824.95.$723.99Current price is: $723.99.
AR15 Uppers
CMMG BANSHEE MK4 UPPER GROUP 5.56X45 10.5 BLK
$107 offOriginal price was: $874.95.$767.99Current price is: $767.99.
AR15 Uppers
CMMG BANSHEE MK4 UPPER GROUP 5.56X45 12.5 BLK
$107 offOriginal price was: $874.95.$767.99Current price is: $767.99.
AR15 Uppers
CMMG BANSHEE UPPER GROUP 5.7X28 5 BLK
$113 offOriginal price was: $924.95.$811.99Current price is: $811.99.
AR15 Bolts
CMMG BOLT CARRIER GROUP M16 556
$18 offOriginal price was: $174.95.$156.99Current price is: $156.99.