PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear MBUS No BCG/CH

Name: PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear MBUS No BCG/CH
Brand: Palmetto State Armory
SKU: 77932953
Price: 249.99 USD
Availability: InStock

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PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear MBUS No BCG/CH - Upper Receiver for AR-15 - view 1

PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear MBUS No BCG/CH - Upper Receiver for AR-15

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Palmetto State Armory

Overview

The PSA 16" Nitride 1:7 M4 Carbine Upper Assembly is a complete upper receiver designed for the AR-15 platform, featuring a 16-inch barrel optimized for 5.56 NATO ammunition. With a twist rate of 1:7, this upper assembly stabilizes a wide range of bullet weights, making it versatile for various shooting applications. The carbine-length gas system enhances reliability and function, making it a popular choice for builds that prioritize a balance between performance and maneuverability.

Specifications

MPN77932953

Barrel Length16

PlatformAR-15

Gas System LengthCarbine

Caliber5.56 NATO

ColorBlack

Twist Rate1:7

AssemblyComplete

Receiver TypeM4

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PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear MBUS No BCG/CH

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Prices checked Oct 11, 2026

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$250

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Build history on GunPartPicker

Builders on GunPartPicker first added the PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear MBUS No BCG/CH to a build in April 2026.

Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $249.99, so there haven't been real sales lately. Buying today, the lowest price is $249.99 at Palmetto State Armory, which matches the best price we saw in September.

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Updated Oct 11, 2026 · from real builds on GunPartPicker · Prices checked Oct 11, 2026 · refreshed daily across 37 retailers