Palmetto State Armory

PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE

All Palmetto State Armory lower receivers
Palmetto State Armory PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE - Lower Receiver for AR-15 - view 1

Plan where it ships

Firearms ship to a dealer (FFL), not your door. Pick one now to see your full cost.

Palmetto State Armory

Overview

The PSA Complete Lower 300BO is a fully assembled lower receiver designed specifically for the AR-15 platform, optimized for the 300 Blackout caliber. Made from durable 7075-T6 aluminum and featuring a forged construction, this lower is built to withstand the rigors of shooting while providing a solid foundation for your build. With a trigger pin diameter of .154, it is compatible with a wide range of aftermarket triggers. This lower commonly appears in pistol builds, particularly those chambered in 300 Blackout, making it a versatile choice for builders looking to enhance their firearm's capabilities.

Specifications

Caliber300 Blackout
PlatformAR-15
ColorFDE
StyleForged
Material7075-T6 Aluminum
AssemblyComplete
Trigger Pin.154

Available Merchants

Price Alert

Get an email if the price drops 10% or more.

No Available merchants at this time.

Build history on GunPartPicker

Builders have added the PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE to their builds on GunPartPicker. Since April 2026, it ranks #556 of the 1,217 lower receivers builders have added. Builds with this lower receiver are mostly chambered in 300 Blackout (90%, then 5.56 NATO 10%), nearly all on pistol-length gas, and nearly all AR-15.

Trending lower receivers →

Updated · from real builds on GunPartPicker

Not sure which lower receiver to pick?

We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.

Read the guide: AR-15 Lower Receiver Trends →

Check it against the live catalog:

Frequently Built With

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

Ghost Firearms Elite Complete Upper Receiver .300 Blackout 7.5 inch Pistol Length 4150 Light HBAR Barrel 1-8 Twist 7 inch M-LOK Free Float Hand Guard

Ghost Firearms Elite Complete Upper Receiver .300 Blackout 7.5 inch Pistol Length 4150 Light HBAR Barrel 1-8 Twist 7 inch M-LOK Free Float Hand Guard

Upper Receiver$300 · out of stockin 6% of them
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green

Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green

Charging Handle$155in 24% of them
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger

Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger

Trigger$335in 18% of them
FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR

FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR

Bolt Carrier Groupin 12% of them
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011

Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011

Stock & Brace$82in 12% of them
Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"

Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"

Handguard$174in 12% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Caliber

90%
300 Blackout90%
5.56 NATO10%

Builds Featuring This Part

See all builds →

Builds in the community that include the PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE

BuildPartsTotal
latest build build
latest build		8$1195.84

Review this product

Share your thoughts with other customers

Be the first to review

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