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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Primary Weapons Systems

AR15 Uppers
MK109 MOD 1-M 300BLK UPPER RECEIVER W/9.75” BBL
$160 off
Original price was: $1,209.95.Current price is: $1,049.95.
Out of stock. Want to be notified?
Primary Weapons Systems

AR15 Uppers
MK109 MOD 2-M 300 AAC BLACKOUT 9.75” BBL
$200 off
Original price was: $1,499.95.Current price is: $1,299.95.
Out of stock. Want to be notified?
Primary Weapons Systems

AR15 Uppers
MK114 MOD 2-M 223 WYLDE 14.5” BBL COMPLETE
$1,299.95
Out of stock. Want to be notified?
Primary Weapons Systems

AR15 Uppers
MK114 MOD 2-M 223 WYLDE 14.5” BBL COMPLETE
$100 off
Original price was: $1,399.95.Current price is: $1,299.95.
Out of stock. Want to be notified?
Primary Weapons Systems

AR15 Uppers
MK116 MOD 2-M 223 WYLDE 16.1” BBL COMPLETE
$1,299.95
Out of stock. Want to be notified?
Primary Weapons Systems

AR15 Uppers
MK116 MOD 2-M 223 WYLDE 16.1” BBL COMPLETE
$100 off
Original price was: $1,399.95.Current price is: $1,299.95.
Out of stock. Want to be notified?
Precision Reflex

AR15 Uppers
MK12 MOD 0 SPR GEN II 5.56MM 18”
$1,846.99
Out of stock. Want to be notified?
Precision Reflex, Inc.

AR15 Uppers
MK12 MOD 0 SPR GEN III 5.56MM 18”
$1,975.99
Out of stock. Want to be notified?
LMT Defense

AR15 Uppers
MRP-L M-LOK 5.56/300 BLK 13.25” ASSEMBLED UPPER RECEIVER
$912.60
Out of stock. Want to be notified?
LMT Defense

AR15 Uppers
MRP-L M-LOK 5.56/300 BLK 9.25” ASSEMBLED UPPER RECEIVER
$864.00
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LMT Defense

AR15 Uppers
MRP-L M-LOK SPECWAR 5.56MM 11.5” ASSEMBLED UPPER RECEIVER
$912.60
Out of stock. Want to be notified?
LMT Defense

AR15 Uppers
MRP-L QUAD 5.56/300 BLK 9.25” ASSEMBLED UPPER RECEIVER
$864.00
Out of stock. Want to be notified?
Nordic Components

AR15 Uppers
NORDIC NC15 EXTRUDED UPPER RCVR BLK
$10 off
Original price was: $99.95.Current price is: $89.95.
Out of stock. Want to be notified?
Odin Works

AR15 Barrels
ODIN BARREL 300 BLACKOUT – 16.1″ MEDIUM PROFILE
$15 off
Original price was: $305.00.Current price is: $289.75.
Out of stock. Want to be notified?
Odin Works

AR15 Barrels
ODIN BARREL 6.5 GRENDEL 18″ – DMR PROFILE
$29 off
Original price was: $480.00.Current price is: $451.25.
Out of stock. Want to be notified?
Odin Works

AR15 Barrels
ODIN BARREL PISTOL 300 BLK – 10.5″ MEDIUM
$50 off
Original price was: $270.00.Current price is: $219.99.
Out of stock. Want to be notified?