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Primary Weapon Systems
Overview
The Primary Weapons System MK1 Mod 2-M AR-15 Stripped Lower Receiver is designed for builders looking to create a versatile platform, capable of accommodating multiple calibers. Its ambidextrous controls enhance usability for both left and right-handed shooters, while the hardcoat anodized black finish provides durability and a sleek aesthetic. This lower receiver is often utilized in a variety of custom builds, making it a solid choice for those aiming to tailor their AR-15 to specific needs.
Primary Weapons System MK1 Mod 2-M AR-15 Stripped Lower Receiver Anodized Black
Builders have been adding the Primary Weapons System MK1 Mod 2-M AR-15 Stripped Lower Receiver Anodized Black to their builds on GunPartPicker since February 2026. All time, it ranks #669 of the 1,001 lower receivers builders have added.
It was hard to find in August 2026, in stock on only 2 of the 11 days we checked, and today 3 of the 5 retailers we track have it in stock. Prices barely moved in August 2026, holding around $260.09, so there haven't been real sales lately. Buying today, the lowest price is $299.95 at MidwayUSA, above August's low of $260.09, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Lower Receiver Trends →Check it against the live catalog:
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