B
blenthe08excellent
Reviewed on April 3, 2026Verified with Build
smooth cycling
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Colt 5.56 NATO M16 / AR-15 Bolt Carrier Group
Colt
Overview
The Colt 5.56 NATO M16 / AR-15 Bolt Carrier Group is designed for reliable function in both 5.56 NATO and .300 BLK calibers, making it a versatile choice for various builds. Its phosphate finish offers corrosion resistance, while the M16-style carrier ensures smooth operation and enhanced reliability during cycling. This bolt carrier group is commonly found in pistol gas system configurations, allowing for a compact and efficient setup in your AR-15 builds.
Specifications
MPNCTSP64028
Caliber5.56 NATO / .300 BLK
FinishPhosphate
StyleM16 Bolt Carrier
August 2026 on GunPartPicker
Colt 5.56 NATO M16 / AR-15 Bolt Carrier Group ranked #77 of the 229 bolt carrier groups builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #72 of the 442 bolt carrier groups builders have added. Builds with this bolt carrier group are split between 5.56 NATO (54%) and 300 Blackout (39%), split between pistol-length (46%) and carbine-length (27%) gas systems, and mostly AR-15 (92%).
It was hard to find in August 2026, in stock on only 1 of the 19 days we checked, and today none of the 2 retailers we track has it in stock right now. Prices barely moved in August 2026, holding around $182.77, so there haven't been real sales lately. Listed prices start at $182.77 at BattleHawk Armory for when it comes back.
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Frequently Built With
The part most often added in each category by the 32 builds that include this one
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Upper Receiver$129 · out of stockin 5 builds
Colt M4 Commando 5.56mm Semi-Auto Lower Receiver Assembly With "LE" Prefix
Lower Receiver$450 · out of stockin 7 builds
Pri M84 Gas Buster Charging Handle With Military Big Latch - FDE
Charging Handle$94in 4 builds
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Trigger$335in 3 builds
Magpul AFG-2 Angled Fore Grip - Black
Foregrip$24in 4 builds
B5 Systems SOPMOD Government, Mil Spec, Coyote - SOP1352
Stock & Brace$84in 2 builds
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
92.3%
AR-1592.3%
AR-107.7%
CaliberBased on real build data showing which calibers builders choose alongside this product.
53.8%
5.56 NATO53.8%
300 Blackout38.5%
.223 Wylde7.7%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
45.5%
Pistol45.5%
Carbine27.3%
Mid-Length18.2%
Rifle9.1%
Builds Featuring This Part
See all 7 →Builds in the community that include the Colt 5.56 Nato M16 / Ar-15 Bolt Carrier Group
| Build | Parts | Total |
|---|---|---|
 | 11 | $1308.99 |
 | 22 | $2505.57 |
 | 19 | $2270.13 |
| 16 | $1250.60 |
 | 21 | $1770.41 |
 | 8 | $1811.14 |
 | 8 | $1523.74 |
Customer reviews
5.0out of 5
2 global ratings
Top reviews
B
bl4ck0niColt M16 BCG stays clean
Reviewed on March 16, 2026Verified with Build
Colt 5.56 M16 BCG runs cleaner than parkerized BCGs. Bolt is the standard Colt mil-spec carpenter steel. Gas key is correctly staked from the factory. Cycles 600 rounds in a class without a hiccup. Premium quality BCG from Colt.
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