THIS WEEK ONLY - Midwest Industries Parts, Tools & Upgrades Up To 27% Off - SHOP NOW!

THIS WEEK ONLY - Midwest Industries Parts, Tools & Upgrades Up To 27% Off - SHOP NOW!

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4509 Site Banners - BRN180 Gen-3 Launch_Category Hero
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THE WAIT IS OVER

Meet The BRN-180® Gen 3 Uppers
Introduce Me!
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No - They're Not Another
Run-Of-The-Mill BCG

See What Sets The Brownells BCG Apart!
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TIRED OF GETTING A FACEFUL OF BLOWBACK?

KAK K-Spec Down Vent BCG Vents Gasses Away From
The Shooter Perfect For Overgassed & Suppressed Guns

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Looking For The Most Impactful AR Upgrade?

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Upgrade Your AR

Rifle Bolts & Bolt Carrier Groups

71 Items

Rifle Bolts & Bolt Carrier Groups Up To 85% Off - 71 Products In Stock / 21 Models

Browse 71 Rifle Bolts & Bolt Carrier Groups from our Rifle Parts dept including Bolt Carrier Groups, Rifle Bolts, & Bolt Carrier Parts Up To 85% Off from TOP Brands including BROWNELLS, J P ENTERPRISES, KAK INDUSTRY LLC., & FAXON FIREARMS.

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LAW TACTICAL LLC - AR-15 ARIC INTERNAL CARRIERS W/LAW FOLDER LAW TACTICAL LLC - AR-15 ARIC INTERNAL CARRIERS W/LAW FOLDER
5 Stars
(5.0)

$599.99

In stock
J P ENTERPRISES - AR.308 FULL MASS OPERATING SYSTEM COMPLETE CARRIER GROUP J P ENTERPRISES - AR.308 FULL MASS OPERATING SYSTEM COMPLETE CARRIER GROUP
5 Stars
(5.0)

$479.75

In stock
J P ENTERPRISES - AR.308 BOLT CARRIER J P ENTERPRISES - AR.308 BOLT CARRIER
5 Stars
(5.0)

$280.25

In stock
J P ENTERPRISES - AR-15 FULL MASS BOLT CARRIER ASSEMBLY J P ENTERPRISES - AR-15 FULL MASS BOLT CARRIER ASSEMBLY
5 Stars
(5.0)

$232.75

In stock
ANGSTADT ARMS, LLC - AR-15 9MM BOLT CARRIER GROUP ANGSTADT ARMS, LLC - AR-15 9MM BOLT CARRIER GROUP
5 Stars
(5.0)

$221.99

In stock
KAK INDUSTRY LLC. - K-SPEC M16 5.56 NATO BOLT CARRIER GROUP W/SIDE VENT KAK INDUSTRY LLC. - K-SPEC M16 5.56 NATO BOLT CARRIER GROUP W/SIDE VENT
5 Stars
(5.0)

$179.99 - $219.99

In stock
J P ENTERPRISES - 308 AR ENHANCED HIGH PRESSURE BOLT COMPLETION GROUP J P ENTERPRISES - 308 AR ENHANCED HIGH PRESSURE BOLT COMPLETION GROUP
5 Stars
(5.0)

$217.95

In stock
KIDD INNOVATIVE DESIGN - COMPLETE BOLT FOR RUGER 10/22 KIDD INNOVATIVE DESIGN - COMPLETE BOLT FOR RUGER 10/22
5 Stars
(5.0)

$169.00 - $189.99

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BROWNELLS BUNDLES - M16 BCG & MAGPUL AR-15 PMAG GEN M2 MOE MAGAZINE BUILDER'S BUNDLE BROWNELLS BUNDLES - M16 BCG & MAGPUL AR-15 PMAG GEN M2 MOE MAGAZINE BUILDER'S BUNDLE
5 Stars
(5.0)

$182.99

In stock
STERN DEFENSE, LLC - M16 9MM BOLT FOR GLOCK® AND COLT STERN DEFENSE, LLC - M16 9MM BOLT FOR GLOCK® AND COLT
5 Stars
(5.0)

$129.99 - $169.99

In stock
AERO PRECISION - 5.56MMX45 NATO BOLT CARRIER GROUP FOR AR-15 AERO PRECISION - 5.56MMX45 NATO BOLT CARRIER GROUP FOR AR-15
5 Stars
(5.0)

$149.99 - $154.99

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BROWNELLS - BRN-180™ COMPLETE BOLT BROWNELLS - BRN-180™ COMPLETE BOLT
5 Stars
(5.0)

$139.99

In stock
BATTLE ARMS DEVELOPMENT INC. - M16 BOLT CARRIER GROUP BATTLE ARMS DEVELOPMENT INC. - M16 BOLT CARRIER GROUP
5 Stars
(5.0)

$135.99

In stock
STERN DEFENSE, LLC - AR-15 9MM BOLT FOR GLOCK® AND COLT STERN DEFENSE, LLC - AR-15 9MM BOLT FOR GLOCK® AND COLT
5 Stars
(5.0)

$129.99

In stock
J P ENTERPRISES - AR-15/M16 5.56 ENHANCED BOLT COMPLETION GROUP J P ENTERPRISES - AR-15/M16 5.56 ENHANCED BOLT COMPLETION GROUP
5 Stars
(5.0)

$126.99

In stock
Product badge FAXON FIREARMS - RIMFIRE BOLT ASSEMBLY FOR RUGER 10/22® FAXON FIREARMS - RIMFIRE BOLT ASSEMBLY FOR RUGER 10/22®
5 Stars
(5.0)

$109.68

$124.20

In stock
SONS OF LIBERTY GUN WORKS - 5.56X45MM NATO BOLT ASSEMBLY FOR AR-15 SONS OF LIBERTY GUN WORKS - 5.56X45MM NATO BOLT ASSEMBLY FOR AR-15
5 Stars
(5.0)

$104.49

In stock
BROWNELLS - AR15 BOLT CARRIER GROUP 5.56X45MM NITRIDE MP BROWNELLS - AR15 BOLT CARRIER GROUP 5.56X45MM NITRIDE MP
5 Stars
(5.0)

$99.99

In stock
Product badge STERN DEFENSE, LLC - AR-15 GEN 2 BOLT CARRIER FOR GLOCK® & COLT .40S&W STERN DEFENSE, LLC - AR-15 GEN 2 BOLT CARRIER FOR GLOCK® & COLT .40S&W
5 Stars
(5.0)

$93.82

$142.65

In stock
BROWNING - CARRIER GUIDE PIN BROWNING - CARRIER GUIDE PIN
5 Stars
(5.0)

$8.99

In stock
DANIEL DEFENSE - M16 5.56 BOLT CARRIER GROUP DANIEL DEFENSE - M16 5.56 BOLT CARRIER GROUP
5 Stars
(4.9)
Add to cart to see price

In stock
CMMG - AR-15 ECHO CONVERSION KIT 22LR CMMG - AR-15 ECHO CONVERSION KIT 22LR
5 Stars
(4.8)

$182.99

In stock
WMD GUNS - M16 5.56 NICKEL BORON BOLT CARRIER GROUPS WMD GUNS - M16 5.56 NICKEL BORON BOLT CARRIER GROUPS
5 Stars
(4.8)

$174.99 - $180.99

In stock
BROWNELLS - BRN-22® BOLT ASSEMBLY BROWNELLS - BRN-22® BOLT ASSEMBLY
5 Stars
(4.8)

$94.99 - $134.99

Select Items In Stock
BROWNELLS - M16 5.56 BOLT ASSEMBLY NITRIDE MP BROWNELLS - M16 5.56 BOLT ASSEMBLY NITRIDE MP
5 Stars
(4.8)

$46.99

In stock
BROWNELLS - M16 MIL-SPEC MP BOLT CARRIER GROUP BROWNELLS - M16 MIL-SPEC MP BOLT CARRIER GROUP
5 Stars
(4.7)

$129.99

In stock
BROWNELLS - M16 7.62X39 BOLT CARRIER GROUP NITRIDE MP BROWNELLS - M16 7.62X39 BOLT CARRIER GROUP NITRIDE MP
5 Stars
(4.7)

$114.99

In stock
BROWNELLS - AR-15 BOLT CARRIER GAS KEY BROWNELLS - AR-15 BOLT CARRIER GAS KEY
5 Stars
(4.7)

$28.99

In stock
BROWNELLS - M16 5.56 BOLT CARRIER GROUP NITRIDE MP BROWNELLS - M16 5.56 BOLT CARRIER GROUP NITRIDE MP
5 Stars
(4.6)

$98.99

In stock
SONS OF LIBERTY GUN WORKS - 5.56X45MM NATO BOLT CARRIER GROUP FOR AR-15 SONS OF LIBERTY GUN WORKS - 5.56X45MM NATO BOLT CARRIER GROUP FOR AR-15
5 Stars
(4.5)
Add to cart to see price

In stock
LAW TACTICAL LLC - ARIC INTERNAL CARRIERS FOR AR-15 LAW TACTICAL LLC - ARIC INTERNAL CARRIERS FOR AR-15
5 Stars
(4.3)

$396.99 - $419.00

In stock
BRAVO COMPANY - M16 5.56 BOLT CARRIER GROUP BRAVO COMPANY - M16 5.56 BOLT CARRIER GROUP
5 Stars
(4.3)

$184.99 - $218.99

In stock
Products:   –   of 129