Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate

Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate - Bolt Carrier Group for AR-15 - view 1
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Rosco Manufacturing

Overview

The Rosco Manufacturing 5.56/300BLK Bolt Carrier Group is designed for reliable operation in both 5.56 NATO and 300 Blackout builds. Its phosphate finish provides a durable surface that helps resist wear and corrosion, ensuring smooth cycling and longevity under various conditions. This BCG is commonly found in tactical and precision builds where dependable performance is essential.

Specifications

MPNROS-BCG-002
Caliber5.56 NATO
FinishPhosphate

Available Merchants(5)

Prices checked

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KY Gun Company logo
KY Gun Company
Flat rate shipping
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In Stock
$166
Ammunition Depot logo
Ammunition Depot
~$28.90 est. shipping
Shipping Speed
In Stock
$169
Optics Planet logo
Optics Planet
Free shipping
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In Stock
$172
Brownells logo
Brownells
Free shipping
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Out of Stock
$144
BattleHawk Armory logo
BattleHawk Armory
Shipping varies
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Out of Stock
$144

Build history on GunPartPicker

Builders have been adding the Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate to their builds on GunPartPicker since March 2026. All time, it ranks #295 of the 445 bolt carrier groups builders have added.

Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 3 of the 5 retailers we track have it in stock. The best price drifted down from $159 to $144 over August 2026 without a real sale. Buying today, the lowest price is $165.74 at KY Gun Company, above August's low of $144, so a better deal may come back.

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Builds Featuring This Part

See all 2 →

Builds in the community that include the Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate

BuildPartsTotal
16" 5.56 build
16" 5.56
21$2146.96
12.5" spike's tactical build build
12.5" spike's tactical build
15$1218.99

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