Lower Receiver

The lower receiver is the serialized, legally-regulated component that serves as the foundation of your AR-15 build. It houses the fire control group (trigger assembly), magazine well, and provides attachment points for the stock, grip, and upper receiver. As the only part requiring an FFL transfer, choosing a quality lower receiver is crucial for your build's reliability and longevity.

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Choose a lower-receiver for your build

Mk1 Mod 2-M Stripped Ambidextrous Lower Receiver
Mk1 Mod 2-M Stripped Ambidextrous Lower Receiver
Primary Weapons 7.6 oz
$299.95 In Stock
Primary Weapons 22-2M100SM1B MK1 Mod 2-M Black Anodized Stripped Lower for AR-15, Oversized Ambi Bolt Release/Catch
Primary Weapons 22-2M100SM1B MK1 Mod 2-M Black Anodized Stripped Lower…
Primary Weapons 7.6 oz
$279.95 In Stock
Primary Weapons Systems MK1 MOD 2-M Complete Rifle Lower Receiver 5.56 NATO Ambidextrous
Primary Weapons Systems MK1 MOD 2-M Complete Rifle Lower Receiver 5.56…
Bundle
Primary Weapons 2.84 oz
$581.10 In Stock
Primary Weapons Systems MK1 Mod 2-M Lower 5.56 NATO with BCM Stock
Primary Weapons Systems MK1 Mod 2-M Lower 5.56 NATO with BCM Stock
Primary Weapons
$599.99
Primary Weapons Systems MK1 Mod 2-M Lower with SBA3 Brace
Primary Weapons Systems MK1 Mod 2-M Lower with SBA3 Brace
Bundle
Primary Weapons
$649.95
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