PSA 16" M4 Nitride 1:7 MOE Black Freedom Upper With BCG & CH - 508045

All Palmetto State Armory upper receivers
Palmetto State Armory PSA 16" M4 Nitride 1:7 MOE BLK Freedom Upper With BCG & CH - 508045 - Upper Receiver for AR-15 - view 1
Palmetto State Armory PSA 16" M4 Nitride 1:7 MOE BLK Freedom Upper With BCG & CH - 508045 - Upper Receiver for AR-15 - view 2
Buy Now

Palmetto State Armory

Overview

The PSA 16" M4 Nitride Upper Receiver is a complete assembly designed for the AR-15 platform, featuring a 16-inch barrel chambered in 5.56 NATO. With a carbine-length gas system and a 1:7 twist rate, this upper is optimized for stability and accuracy, allowing you to effectively stabilize a variety of bullet weights. This upper is commonly used in versatile builds that prioritize both range and maneuverability, making it suitable for everything from tactical applications to recreational shooting.

Specifications

MPN508045
Caliber5.56 NATO
Barrel Length16
Gas System LengthCarbine
PlatformAR-15
ColorBlack
AssemblyComplete
Twist Rate1:7
Receiver TypeM4

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
$309.99

October 2026 on GunPartPicker

PSA 16" M4 Nitride 1:7 MOE Black Freedom Upper With BCG & CH - 508045 ranked #360 of the 844 upper receivers builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #458 of the 2,066 upper receivers builders have added.

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 $299.99, with no real sale all month. Buying today, the lowest price is $309.99 at Palmetto State Armory.

Trending upper receivers →

Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers

Not sure which upper receiver to pick?

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

Read the guide: Most Popular AR-15 Upper Receivers →

Review this product

Share your thoughts with other customers

Be the first to review

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