Palmetto State Armory

PSA 5.56 Phosphate MPI Full-Auto Bolt Carrier Group

All Palmetto State Armory bolt carrier groups
Palmetto State Armory PSA 5.56 Phosphate MPI Full-Auto Bolt Carrier Group - Bolt Carrier Group for AR-15 - view 1
Buy Now

Palmetto State Armory

Overview

The PSA 5.56 Phosphate MPI Full-Auto Bolt Carrier Group is designed for reliable performance in 5.56 NATO chambered rifles. The phosphate finish offers a level of corrosion resistance while maintaining a rugged, no-nonsense appearance. This bolt carrier group is commonly found in builds focused on durability and consistent functionality, making it a solid choice for both tactical and recreational shooting applications.

Specifications

MPN5165450548
Caliber5.56 NATO
FinishPhosphate

Available Merchants(1)

Prices checked

Price Alert

Get an email if the price drops 10% or more.
Palmetto State Armory logo
Palmetto State Armory
Free shipping
Shipping Speed
In Stock
$99.99
Buy Now

Build history on GunPartPicker

Builders have added the PSA 5.56 Phosphate MPI Full-Auto Bolt Carrier Group to their builds on GunPartPicker. Since April 2026, it ranks #150 of the 552 bolt carrier groups builders have added. Builds with this bolt carrier group are mostly chambered in 5.56 NATO (83%, then 300 Blackout 17%), split between pistol-length (42%) and carbine-length (33%) gas systems, and nearly all AR-15.

Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $99.99, with no real sale all month. Buying today, the lowest price is $99.99 at Palmetto State Armory, which matches the best price we saw in October.

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

Smith & Wesson Sw M&P15 Stripped Lower Receiver 5.56mm

Smith & Wesson Sw M&P15 Stripped Lower Receiver 5.56mm

Lower Receiver$132in 15% of them
Wilson Combat AR-15 Billet Upper Receiver

Wilson Combat AR-15 Billet Upper Receiver

Upper Receiverin 15% of them
PSA AR-15 Charging Handle 7075 T6 Forged Mil-Spec - 24080

PSA AR-15 Charging Handle 7075 T6 Forged Mil-Spec - 24080

Charging Handle$20in 8% of them
Magpul AFG-2 Angled Fore Grip - Black

Magpul AFG-2 Angled Fore Grip - Black

Foregrip$24in 15% of them
Rise Armament RA-524 Blitz Elite Performance Drop-In Trigger

Rise Armament RA-524 Blitz Elite Performance Drop-In Trigger

Trigger$200in 8% of them
CMMG Zeroed AR-15 Bolt Catch

CMMG Zeroed AR-15 Bolt Catch

Bolt Catch$2in 15% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Caliber

83.3%
5.56 NATO83.3%
300 Blackout16.7%

Gas System

41.7%
Pistol41.7%
Carbine33.3%
Rifle16.7%
Mid-Length8.3%

Builds Featuring This Part

See all builds →

Builds in the community that include the PSA 5.56 Phosphate MPI Full-Auto Bolt Carrier Group

BuildPartsTotal
PSA 18" build build
PSA 18" build		10$921.67
8" pistol build
8" pistol		26$1659.18

Review this product

Share your thoughts with other customers

Be the first to review

No reviews yet. Be the first to review this product!