Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate
Click to see full view
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
Available Merchants(5)
Prices checked
Price Alert
October 2026 on GunPartPicker
Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate ranked #98 of the 258 bolt carrier groups builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #210 of the 553 bolt carrier groups builders have added.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, but today only Optics Planet has it in stock. It dipped to $159 at BattleHawk Armory for a stretch in October 2026, under its usual $165.74, so sales do come around. Buying today, the lowest price is $205.89 at Optics Planet, above October's low of $159, so a better deal may come back.
Trending bolt carrier groups →
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which bolt carrier group to pick?
We ranked every bolt carrier group by how often it shows up in real builds on GunPartPicker.
Read the guide: The Most Trusted AR-15 BCGs →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Aero Precision Enhanced M-LOK Handguard Gen 2 10.7" Black
Spike's Tactical Stripped AR-15 Lower Receiver - Gadsden
Battle Arms Development Workhorse Forged AR-15 Upper Receiver - Stripped
Strike Industries T-Bone AR-15 Charging Handle for .223/5.56 - Black/Black
ROSCO MANUFACTURING Bloodline Heavy Barrel 300BLK 8.2" Black 5/8x24
Battle Arms Development AR-15 Enhanced Bolt Stop, Black
Builds Featuring This Part
See all builds →Builds in the community that include the Rosco Manufacturing 5.56/300BLK Bolt Carrier Group - Phosphate
| Build | Parts | Total |
|---|---|---|
 | 21 | $2182.11 |
 | 15 | $1198.14 |
No reviews yet. Be the first to review this product!