PSA 16" M4 Carbine-Length 5.56 NATO 1:7 Nitride 15" Lightweight M-LOK Freedom Rifle KIT
All Palmetto State Armory upper receivers
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Palmetto State Armory
Overview
The PSA 16" M4 Carbine-Length 5.56 NATO Rifle Kit is a complete upper receiver designed for the AR-15 platform, featuring a 16-inch barrel with a 1:7 twist rate, which stabilizes a wide range of bullet weights for enhanced accuracy. Its carbine-length gas system ensures reliable cycling and performance, making it suitable for various shooting applications. This upper receiver is commonly found in builds that prioritize the 5.56 NATO caliber and utilize a carbine gas system, making it a versatile choice for builders looking to create a dependable rifle.
Specifications
PSA 16" M4 Carbine-Length 5.56 NATO 1:7 Nitride 15" Lightweight M-LOK Freedom Rifle KIT
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Price Alert
September 2026 on GunPartPicker
PSA 16" M4 Carbine-Length 5.56 NATO 1:7 Nitride 15" Lightweight M-LOK Freedom Rifle KIT ranked #267 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders on GunPartPicker first added it to a build in February 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 $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.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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