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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 63377 posts
AR15 Uppers
CMMG BANSHEE MK4 UPPER GROUP 5.56X45 10.5 BLK
$129 offOriginal price was: $924.95.$795.99Current price is: $795.99.
AR15 Uppers
CMMG BANSHEE MK4 UPPER GROUP 5.56X45 12.5 BLK
$129 offOriginal price was: $924.95.$795.99Current price is: $795.99.
AR15 Uppers
CMMG BANSHEE UPPER GROUP 5.7X28 5 BLK
$136 offOriginal price was: $974.95.$838.99Current price is: $838.99.
AR15 Barrels
CMMG BARREL W/BOLT KIT .45ACP
$47 offOriginal price was: $474.95.$427.99Current price is: $427.99.
AR15 Bolts
CMMG BOLT CARRIER GROUP M16 556
$12 offOriginal price was: $174.95.$162.99Current price is: $162.99.
AR15 Uppers
CMMG DISSENT MK4 UPPER GROUP 300BLK 16.1 BLK
$160 offOriginal price was: $1,299.95.$1,139.99Current price is: $1,139.99.
AR15 Uppers
CMMG ENDEAVOR MK3 UPPER GROUP 6.5CREED 20 BLK
$167 offOriginal price was: $1,199.95.$1,032.99Current price is: $1,032.99.
Small AR15 Parts
CMMG PART KIT AR15 BOLT REHAB
$6 offOriginal price was: $39.95.$33.99Current price is: $33.99.
Small AR15 Parts
CMMG PART KIT AR15 LOWER PINS/SPRING
$2 offOriginal price was: $14.95.$12.99Current price is: $12.99.
Small AR15 Parts
CMMG PARTS KIT AR15 SURVIVAL KIT
$11 offOriginal price was: $64.95.$53.99Current price is: $53.99.
Small AR15 Parts
CMMG PARTS KIT AR15 UPPER PINS/SPRNG
$2 offOriginal price was: $14.95.$12.99Current price is: $12.99.
AR15 Uppers
CMMG RESOLUTE MK4 UPPER GROUP 6MM ARC 16.1
$132 offOriginal price was: $949.95.$817.99Current price is: $817.99.
AR15 Uppers
CMMG UPPER GROUP RESOLUTE MK4 – 300AAC 16.1″
$133 offOriginal price was: $609.95.$476.99Current price is: $476.99.
AR15 Uppers
CMMG Upper Receiver Assembly for Mk4/ AR15 Armor
$24 offOriginal price was: $149.95.$125.99Current price is: $125.99.
AR15 Uppers
CMMG UPPR RSLT MK4 350LEG 16.1″ BLK
$132 offOriginal price was: $949.95.$817.99Current price is: $817.99.
AR15 Uppers
COLT EPR UPPER 5.56 16″ MLOK BLK
$49 offOriginal price was: $1,049.00.$999.99Current price is: $999.99.