AR-AK-SubGuns

Aero Precision

Aero Precision M4E1 Pro Lower Receiver APAR600032AC for AR-15 Builds

Aero Precision

Aero Precision M4E1 Pro Complete Lower Receiver with Kodiak Brown Anodized Finish

Aero Precision

Aero Precision M4E1 Pro Complete Lower Receiver in Kodiak Brown Anodized - APAR600196

Aero Precision

Aero Precision M4E1 Pro Rifle 5.56 NATO with 16-Inch Barrel in OD Green - Part APCR640450

Aero Precision

Aero Precision M4E1 Pro Rifle 5.56 NATO with 16-Inch Barrel - Kodiak Brown Anodized Aluminum Receiver

Heckler & Koch (HK USA)

HK MR762 A4 7.62x51mm Rifle with 13-Inch Threaded Barrel and M-LOK Handguard – Model 81001053

Sharps Bros

Sharps Bros SBLR02 Warthog Stripped AR-15 Lower Receiver with Multi-Caliber Compatibility

Sharps Bros

Sharps Bros SBLR03 The Jack Stripped AR-15 Lower Receiver with Black Anodized Finish

Sharps Bros

Sharps Bros SBLR07 Overthrow Stripped AR-15 Lower Receiver - Multi-Caliber 7075-T6 Aluminum, Black Anodized Finish

Tactical Solutions

Tactical Solutions XRA2TDMB Matte Black Threaded Receiver for Firearms

Tactical Solutions

Tactical Solutions XRA2TDQS X-Ring Receiver Set for Firearms

Pioneer Arms

Pioneer Arms Hellpup 7.62x39mm Semi-Auto Rifle with 11.73-inch Threaded Barrel