PSA 16" M4 Carbine 1:7 Nitride 13.5" Lightweight M-LOK Freedom Upper w/ MBUS Sight Set - No BCG/CH
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Palmetto State Armory
Overview
The PSA 16" M4 Carbine Upper is a complete upper receiver designed for the AR-15 platform, featuring a 16-inch barrel optimized for 5.56 NATO caliber ammunition. With a 1:7 twist rate, this upper effectively stabilizes a wide range of bullet weights, making it versatile for various shooting applications. The carbine-length gas system ensures reliable cycling and performance, while the included M-Lok rail allows for easy attachment of accessories. This upper is commonly used in standard tactical builds and lightweight configurations, perfect for builders seeking a reliable and adaptable setup.
Specifications
PSA 16" M4 Carbine 1:7 Nitride 13.5" Lightweight M-LOK Freedom Upper w/ MBUS Sight Set - No BCG/CH
Available Merchants(1)
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Price Alert
September 2026 on GunPartPicker
PSA 16" M4 Carbine 1:7 Nitride 13.5" Lightweight M-LOK Freedom Upper w/ MBUS Sight Set - No BCG/CH ranked #43 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #83 of the 1,877 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.
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 $289.99, so there haven't been real sales lately. Buying today, the lowest price is $289.99 at Palmetto State Armory, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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