Diamondback

Diamondback Firearms 5.56 AR-15 Bolt Carrier Group - Nitride

Diamondback Firearms 5.56 Ar-15 Bolt Carrier Group - Nitride - Bolt Carrier Group for AR-15 - view 1

Diamondback

Overview

The Diamondback Firearms 5.56 AR-15 Bolt Carrier Group features a robust design tailored for reliable performance in 5.56 NATO builds. Its nitride finish enhances durability and corrosion resistance, ensuring smooth operation and longevity under rigorous conditions. This BCG is commonly used in mid-length gas system builds, making it a solid choice for those looking to optimize cycling and reliability in their AR-15 platform.

Specifications

MPNDB15-BCGS
StyleAR-15 Bolt Carrier
Caliber5.56 NATO
FinishNitride

Available Merchants

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Build history on GunPartPicker

Builders have been adding the Diamondback Firearms 5.56 AR-15 Bolt Carrier Group - Nitride to their builds on GunPartPicker since March 2026. All time, it ranks #216 of the 503 bolt carrier groups builders have added. Builds with this bolt carrier group are mostly chambered in 5.56 NATO (69%, then .223 Wylde 12%), split between mid-length (48%) and carbine-length (24%) gas systems, and nearly all AR-15.

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Frequently Built With

The part most often added in each category by the builds that include this one

Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C

Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C

Charging Handle$80in 35% of them
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock

Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock

Lower Receiver$234 · out of stockin 27% of them
Wilson Combat AR-15 Billet Upper Receiver

Wilson Combat AR-15 Billet Upper Receiver

Upper Receiverin 23% of them
Daniel Defense 14.5" 5.56 NATO CHF Mid-Length 1:7 Government Contour AR-15 Barrel With Gas Block

Daniel Defense 14.5" 5.56 NATO CHF Mid-Length 1:7 Government Contour AR-15 Barrel With Gas Block

Barrel$420in 11% of them
ALG Defense Qms AR-15 Trigger Set

ALG Defense Qms AR-15 Trigger Set

Trigger$61in 18% of them
Maximize Your AR-15's Potential with Tacfire's 15" ACE M-LOK Handguard - Black Excellence - HG20-15

Maximize Your AR-15's Potential with Tacfire's 15" ACE M-LOK Handguard - Black Excellence - HG20-15

Handguard$46in 17% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

100%
AR-15100%

Caliber

68.9%
5.56 NATO68.9%
.223 Wylde11.7%
300 Blackout10.7%
.450 Bushmaster4.9%
.223 Remington1.9%
Other2%

Gas System

47.8%
Mid-Length47.8%
Carbine23.9%
Rifle15.2%
Pistol13%

Builds Featuring This Part

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Builds in the community that include the Diamondback Firearms 5.56 Ar-15 Bolt Carrier Group - Nitride

BuildPartsTotal
Vltor 30" build build
Vltor 30" build		18$1859.68
as a backup 16" build
as a backup 16"		8$523.75
16" 5.56 build
16" 5.56		5$161.50
yankee hill machine 16" 5.56 build
yankee hill machine 16" 5.56		22$1812.88
First 5.56 build build
First 5.56 build		14$932.30
DMR 14.5" build
DMR 14.5"		33$3008.72
KE Arms 16" 5.56 build
KE Arms 16" 5.56		28$3413.89
First 5.56 build build
First 5.56 build		25$1295.87
Range 20" 5.56 build
Range 20" 5.56		21$1226.84
for hunting hogs 16.5" build
for hunting hogs 16.5"		10$523.80
Lead star arms 20" build build
Lead star arms 20" build		10$1543.99
For 2 gun 16" build
For 2 gun 16"		18$1117.98

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