Centurion Arms CM4 5.56 Forged AR-15 Receiver Set
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Centurion Arms
Overview
The Centurion Arms CM4 5.56 Forged AR-15 Receiver Set is a complete assembly designed for the AR-15 platform, crafted to accommodate the 5.56 NATO caliber. Being a forged receiver set, it provides enhanced strength and durability, making it a reliable foundation for your build. This receiver set is commonly used in a variety of tactical and sport shooting configurations, ensuring versatility for different applications.
Specifications
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Price Alert
October 2026 on GunPartPicker
Centurion Arms CM4 5.56 Forged AR-15 Receiver Set ranked #29 of the 588 lower receivers builders added on GunPartPicker in October 2026, behind the Bravo Company BCM MK2 RMS-M1T0 Mod-2 SOPMOD AR-15 Complete Lower Receiver Anodized Black, with about 1 in every 167 lower receivers added to builds. Up from #60 in September. Builds with this lower receiver are nearly all chambered in 5.56 NATO, mostly on mid-length gas (94%), and nearly all AR-15.
It was in stock most times we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $225.63, with no real sale all month. Buying today, the lowest price is $225.63 at Primary Arms, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Geissele Automatics G2S Two Stage AR-15 Trigger .154"
FN AR-15 M16 Barrel 16 Mid-Length 5.56mm
Bravo Company M16 Bolt Carrier Group Black
Sons of Liberty Gun Works Gas Block V2 - .750"
Sons of Liberty Gun Works AR-15 Gas Tube Stainless Steel Mid-Length
Magpul MOE Grip Polymer Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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