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    Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface.
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PRO Series

PRO Series

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Lower Parts

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Added

M4E1 Threaded PRO Complete Upper, 16.3" 5.56 CHF Mid-Length Barrel w/ 15" ATLAS S-ONE M-LOK HG - Anodized Black

M4E1 Threaded PRO Complete Upper, 16.3" 5.56 CHF Mid-Length Barrel w/ 15" ATLAS S-ONE M-LOK HG - Anodized Black

Added

M4E1 Enhanced PRO Complete Upper, 16.3" 5.56 CHF Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard - Anodized Black

M4E1 Enhanced PRO Complete Upper, 16.3" 5.56 CHF Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard - Anodized Black

Added

M4E1 Threaded PRO Complete Upper w/ 12.5" 5.56 CHF Mid-Length Barrel and 10.3" ATLAS R-ONE Handguard - Anodized Black

M4E1 Threaded PRO Complete Upper w/ 12.5" 5.56 CHF Mid-Length Barrel and 10.3" ATLAS R-ONE Handguard - Anodized Black

Added

M4E1 Threaded PRO Complete Upper w/ 13.7" 5.56 CHF Mid-Length Barrel and 12.7" ATLAS R-ONE Handguard - Anodized Black

M4E1 Threaded PRO Complete Upper w/ 13.7" 5.56 CHF Mid-Length Barrel and 12.7" ATLAS R-ONE Handguard - Anodized Black

Added

M4E1 Threaded PRO Complete Upper w/ 16.3" 5.56 CHF Mid-Length Barrel and 15" ATLAS R-ONE Handguard - Anodized Black

M4E1 Threaded PRO Complete Upper w/ 16.3" 5.56 CHF Mid-Length Barrel and 15" ATLAS R-ONE Handguard - Anodized Black

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