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Koch Arms
AR-15
Lower Parts
Upper Parts
Magazines
AK/UZI
Rifles
Magazines
Firearms
Rifles
Handguns
Optics & Sights
Sights
Ammo
Rifle Ammo
Handgun Ammo
Hard Cast Bullets
NFA
Suppressors
Services
Transfers
Custom Builds
Laser Engraving
Barrel Threading
Gas Block Pinning
Ultrasonic Cleaning
Re-chamber Service
41 Special Die Modification
Ext. Flash Hider Pin & Weld
H&R/NEF Repair
Contact
Login Account
Folder: AR-15
Back
Lower Parts
Upper Parts
Magazines
Folder: AK/UZI
Back
Rifles
Magazines
Folder: Firearms
Back
Rifles
Handguns
Folder: Optics & Sights
Back
Sights
Folder: Ammo
Back
Rifle Ammo
Handgun Ammo
Hard Cast Bullets
Folder: NFA
Back
Suppressors
Folder: Services
Back
Transfers
Custom Builds
Laser Engraving
Barrel Threading
Gas Block Pinning
Ultrasonic Cleaning
Re-chamber Service
41 Special Die Modification
Ext. Flash Hider Pin & Weld
H&R/NEF Repair
Contact
Login Account
Lower Parts Matrix Arms AR-15 Lower Receiver
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Matrix Arms AR-15 Lower Receiver

$0.00
sold out

*WE ARE MAINLY A RETAIL STORE, BUT WE WILL SHIP OUT. FOR ALL ONLINE FIREARM ORDERS, YOU MUST SEND COPY OF FFL YOU WANT IT TO BE SHIPPED TO. EMAIL COPY TO KOCHARMS@FASTMAIL.FM

Designed with quality and durability in mind, the Matrix 5.56 stripped lower is the ultimate foundation for your next build.

  • Machined from American-made Mil-Spec 7075 T-6 aluminum forgings

  • .250 take down/pivot pin holes

  • .156 fire control pins

  • Hardcoat anodized/matte black finish

  • Weight 14 Oz

Add To Cart

*WE ARE MAINLY A RETAIL STORE, BUT WE WILL SHIP OUT. FOR ALL ONLINE FIREARM ORDERS, YOU MUST SEND COPY OF FFL YOU WANT IT TO BE SHIPPED TO. EMAIL COPY TO KOCHARMS@FASTMAIL.FM

Designed with quality and durability in mind, the Matrix 5.56 stripped lower is the ultimate foundation for your next build.

  • Machined from American-made Mil-Spec 7075 T-6 aluminum forgings

  • .250 take down/pivot pin holes

  • .156 fire control pins

  • Hardcoat anodized/matte black finish

  • Weight 14 Oz

*WE ARE MAINLY A RETAIL STORE, BUT WE WILL SHIP OUT. FOR ALL ONLINE FIREARM ORDERS, YOU MUST SEND COPY OF FFL YOU WANT IT TO BE SHIPPED TO. EMAIL COPY TO KOCHARMS@FASTMAIL.FM

Designed with quality and durability in mind, the Matrix 5.56 stripped lower is the ultimate foundation for your next build.

  • Machined from American-made Mil-Spec 7075 T-6 aluminum forgings

  • .250 take down/pivot pin holes

  • .156 fire control pins

  • Hardcoat anodized/matte black finish

  • Weight 14 Oz

Contact

Ken: (715) 432-0872

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Hours

SHOP OPEN ON SATURDAY

Contact Hours: 24/7

Location

Tomahawk, WI, 54487