PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE
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This is a serialized firearm.
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
PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE
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Build history on GunPartPicker
Builders have been adding the PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE to their builds on GunPartPicker since January 2026. All time, it ranks #516 of the 996 lower receivers builders have added. Builds with this lower receiver are nearly all chambered in 300 Blackout and nearly all AR-15.
Updated · from real builds on GunPartPicker
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Frequently Built With
The part most often added in each category by the 16 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
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR
Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"
Builds Featuring This Part
See all 1 →Builds in the community that include the PSA Complete Lower 300BO, JAKL, MOE EPT, F5 Brace, FDE
| Build | Parts | Total |
|---|---|---|
 | 8 | $1131.01 |
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