PSA 16" Mid-Length 5.56 NATO 1:7 Nitride Timber Creek Enforcer 15" M-LOK Upper - Without BCG or CH

All Palmetto State Armory upper receivers

Palmetto State Armory PSA 16" Mid-Length 5.56 NATO 1:7 Nitride Timber Creek Enforcer 15" M-Lok Upper - Without BCG or CH - Upper Receiver for AR-15 - view 2

Palmetto State Armory PSA 16" Mid-Length 5.56 NATO 1:7 Nitride Timber Creek Enforcer 15" M-Lok Upper - Without BCG or CH - Upper Receiver for AR-15 - view 3

Palmetto State Armory PSA 16" Mid-Length 5.56 NATO 1:7 Nitride Timber Creek Enforcer 15" M-Lok Upper - Without BCG or CH - Upper Receiver for AR-15 - view 4

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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 platforms, featuring a 16-inch barrel with a mid-length gas system. The 1:7 twist rate is optimized for stabilizing heavier projectiles, making it suitable for a variety of ammunition types. This upper is commonly used in builds that prioritize a mid-length gas system and chambered in 5.56 NATO, providing a balance of recoil control and reliability.

Specifications

MPN5655103899

Barrel Length16

Gas System LengthMid-Length

Caliber5.56 NATO

Twist Rate1:7

AssemblyComplete

PlatformAR-15

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PSA 16" Mid-Length 5.56 NATO 1:7 Nitride Timber Creek Enforcer 15" M-LOK Upper - Without BCG or CH

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Build history on GunPartPicker

Builders on GunPartPicker first added the PSA 16" Mid-Length 5.56 NATO 1:7 Nitride Timber Creek Enforcer 15" M-LOK Upper - Without BCG or CH to a build in February 2026. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on mid-length gas, and nearly all AR-15.

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Updated Oct 11, 2026 · from real builds on GunPartPicker