PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-LOK Classic Rifle KIT

All Palmetto State Armory upper receivers

2 options

Nitride, this page
Phosphateout of stock

Palmetto State Armory PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-Lok Classic Rifle Kit - Upper Receiver for AR-15 - view 1

Palmetto State Armory PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-Lok Classic Rifle Kit - Upper Receiver for AR-15

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Palmetto State Armory

Overview

The PSA 16" Mid-Length 5.56 NATO Upper Receiver is a complete assembly designed for AR-15 builds, featuring a 16-inch barrel and a mid-length gas system. The 1:7 twist rate is optimal for stabilizing a wide range of bullet weights, making this upper suitable for both target shooting and tactical applications. This upper receiver is commonly found in builds aimed at versatility and performance, particularly among those looking for a balanced setup for a variety of shooting scenarios.

Specifications

MPN51655106752

Twist Rate1:7

PlatformAR-15

Gas System LengthMid-Length

Barrel Length16

Caliber5.56 NATO

AssemblyComplete

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PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-LOK Classic Rifle KIT

2 options

Nitride, this page
Phosphateout of stock

Available Merchants(1)

Prices checked Oct 11, 2026

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Palmetto State Armory

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$420

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Build history on GunPartPicker

Builders have been adding the PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13.5" Lightweight M-LOK Classic Rifle KIT to their builds on GunPartPicker since March 2026. All time, it ranks #964 of the 1,714 upper receivers builders have added.

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 $419.99, so there haven't been real sales lately. Buying today, the lowest price is $419.99 at Palmetto State Armory, which matches the best price we saw in September.

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Updated Oct 12, 2026 · from real builds on GunPartPicker · Prices checked Oct 11, 2026 · refreshed daily across 37 retailers