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PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - with BCG/CH & Rear MBUS

Name: PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - with BCG/CH & Rear MBUS
Brand: Palmetto State Armory
SKU: 516447394
Price: 329.99 USD
Availability: InStock

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Palmetto State Armory PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - with BCG/CH & Rear MBUS - view 1

Palmetto State Armory PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - with BCG/CH & Rear MBUS

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Overview

The PSA 16" Nitride 1:7 M4 Carbine Upper Assembly is a complete upper designed for the AR-15 platform, featuring a 16-inch barrel optimized for 5.56 NATO caliber ammunition. With a carbine-length gas system and a 1:7 twist rate, this upper provides reliable cycling and improved stabilization for a variety of bullet weights, making it versatile for different shooting applications. This assembly commonly appears in builds focused on standard 5.56 NATO configurations with a carbine gas system, appealing to builders looking for a dependable and straightforward upper assembly.

Specifications

MPN516447394

Caliber5.56 NATO

Barrel Length16

Gas System LengthCarbine

AssemblyComplete

PlatformAR-15

ColorBlack

Twist Rate1:7

Receiver TypeM4

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PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - with BCG/CH & Rear MBUS

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Available Merchants(1)

Prices checked Sep 29, 2026

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$330

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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 BCG/CH & Rear MBUS to a build in February 2026.

Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today the one retailer we track has it in stock. Prices barely moved in August 2026, holding around $329.99, so there haven't been real sales lately. Buying today, the lowest price is $329.99 at Palmetto State Armory, which matches the best price we saw in August.

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Updated Sep 29, 2026 · from real builds on GunPartPicker · Prices checked Sep 29, 2026 · refreshed daily across 35 retailers