• Welcome to the NEW Fostech.com website! • SHOP SALE & CLEARANCE FosTecH Foxhole

Making the world safer one firearm at a time.®
  • Videos
  • Photos
  • Documents
  • Dealers
    • Dealer Locator
    • Become a Dealer
    • Dealer Login
  • NFA/Military/First Responder
    • N.F.A.
    • Military & L.E.
    • First Responder Program
  • Wholesale
  • About
  • Contact
  • Call
FosTecH, Inc.

CALL US

(812) 445-4028
WELCOME

Sign In / Register
00
See All
  • Home
  • Rifles/SBR/Braced Pistols
    • Shop by Series
      • Stealth
      • Flite
      • Tech
    • Shop by Caliber
      • 5.56
      • 9mm
      • .300 Blackout
      • .22 Long Rifle
    • Shop by Type/Purpose
      • Long Range Rifles
      • 16″ Barrel Rifles
      • Short Barrel Rifles
      • Braced Pistols
    • Build Your AR
    • AR-15 Parts & Accessories
  • Origin Shotguns
    • Origin Shotguns
    • Origin-12 Accessories
  • Handguns
  • Echo Triggers
    • Echo Triggers
    • Echo Replacement Parts
      • Echo AR II Trigger
      • Echo Sport Trigger
      • Echo AK Trigger
  • Accessories
    • Drums
    • Origin-12 Accessories
    • Drone Handguns
      • Predator Sig 320 Parts
    • AR-15 Parts & Accessories
      • Triggers
      • Quad Rails/Handguards
      • Stocks, Grips, Braces, & Folding Adapters
      • Upper & Lower Receivers/Builder Kits
      • Upper & Lower Parts
      • Complete Upper Receivers
      • Complete Lower Receivers
      • Caliber Conversion Kits
      • AR Lightweight Components
      • All AR-15 Parts & Accessories
    • AK Parts & Accessories
    • Sights & Optics
    • M Lock/Picatinny Mounts, Rails & Slings
    • Gun Cases, Racks, Vehicle Mounts, etc.
  • Packages & Sets
  • Ammo
  • Merch
  • FoxholeSALE
  • Home
  • Rifles/SBR/Braced Pistols
    • Shop by Series
      • Stealth
      • Flite
      • Tech
    • Shop by Caliber
      • 5.56
      • 9mm
      • .300 Blackout
      • .22 Long Rifle
    • Shop by Type/Purpose
      • Long Range Rifles
      • 16″ Barrel Rifles
      • Short Barrel Rifles
      • Braced Pistols
    • Build Your AR
    • AR-15 Parts & Accessories
  • Origin Shotguns
    • Origin Shotguns
    • Origin-12 Accessories
  • Handguns
  • Echo Triggers
    • Echo Triggers
    • Echo Replacement Parts
      • Echo AR II Trigger
      • Echo Sport Trigger
      • Echo AK Trigger
  • Accessories
    • Drums
    • Origin-12 Accessories
    • Drone Handguns
      • Predator Sig 320 Parts
    • AR-15 Parts & Accessories
      • Triggers
      • Quad Rails/Handguards
      • Stocks, Grips, Braces, & Folding Adapters
      • Upper & Lower Receivers/Builder Kits
      • Upper & Lower Parts
      • Complete Upper Receivers
      • Complete Lower Receivers
      • Caliber Conversion Kits
      • AR Lightweight Components
      • All AR-15 Parts & Accessories
    • AK Parts & Accessories
    • Sights & Optics
    • M Lock/Picatinny Mounts, Rails & Slings
    • Gun Cases, Racks, Vehicle Mounts, etc.
  • Packages & Sets
  • Ammo
  • Merch
  • FoxholeSALE

Upper & Lower Receivers/Builder Kits

  • Home
  • Shop
  • FosTecH Firearms Accessories
  • AR-15 Accessories
  • Upper & Lower Receivers/Builder Kits
  • Flite Stripped Upper Receiver
    AR Lightweight Components, AR-15 Accessories, FosTecH Firearms Accessories, Upper & Lower Receivers/Builder Kits

    Flite Stripped Upper Receiver
    0 out of 5
    $249.99
    Add to cart
    Add to wishlist
    Quick View
  • Flite Upper and Lower Receiver Set
    AR Lightweight Components, AR-15 Accessories, FosTecH Firearms Accessories, Upper & Lower Receivers/Builder Kits

    Flite Upper and Lower Receiver Set
    0 out of 5
    $482.99
    Add to cart
    Add to wishlist
    Quick View

  • Flite Stripped Lower Receiver
    AR Lightweight Components, AR-15 Accessories, FosTecH Firearms Accessories, Upper & Lower Receivers/Builder Kits

    Flite Stripped Lower Receiver
    0 out of 5
    $259.99
    Add to cart
    Add to wishlist
    Quick View
  • Tech Stripped Lower Receiver
    AR-15 Accessories, Upper & Lower Receivers/Builder Kits

    Tech Stripped Lower Receiver
    0 out of 5
    $79.99
    Add to cart
    Add to wishlist
    Quick View
  • Stealth Raptor Builders Kit w/ Mach 2 Handguard
    MORE COLORS & HANDGUARD LENGTHS
    AR Lightweight Components, AR-15 Accessories, FosTecH Firearms Accessories, Packages & Matching Sets, Upper & Lower Receivers/Builder Kits

    Stealth Raptor Builders Kit w/ Mach 2 Handguard
    0 out of 5
    Starting at: $659.99
    Select options This product has multiple variants. The options may be chosen on the product page
    Add to wishlist
    Quick View

  • Stealth Raptor Builders Kit w/ Mach 1 Handguard
    MORE COLORS & HANDGUARD LENGTHS
    AR Lightweight Components, AR-15 Accessories, FosTecH Firearms Accessories, Packages & Matching Sets, Upper & Lower Receivers/Builder Kits

    Stealth Raptor Builders Kit w/ Mach 1 Handguard
    0 out of 5
    Starting at: $689.99
    Select options This product has multiple variants. The options may be chosen on the product page
    Add to wishlist
    Quick View

  • Tech Upper Receiver 1Tech Upper Receiver 2
    AR-15 Accessories, FosTecH Firearms Accessories, Upper & Lower Receivers/Builder Kits

    Tech Stripped Upper Receiver
    0 out of 5
    $79.99
    Add to cart
    Add to wishlist
    Quick View
  • Fostech 15 Mach 4 handguard Tungsten builder kitFostech 10 Mach 4 handguard OD green Builder Kit
    MORE COLORS & HANDGUARD LENGTHS
    AR Lightweight Components, AR-15 Accessories, FosTecH Firearms Accessories, Packages & Matching Sets, Upper & Lower Receivers/Builder Kits

    Stealth Raptor Builders Kit w/ Mach 4 Handguard
    0 out of 5
    Starting at: $659.99
    Select options This product has multiple variants. The options may be chosen on the product page
    Add to wishlist
    Quick View

  • Flite Complete Lower Receiver TomahawkFlite Complete Lower SBA3
    MORE TRIGGERS & STOCKS / BRACES
    AR Lightweight Components, AR-15 Accessories, Complete Lower Receivers, Upper & Lower Receivers/Builder Kits

    Flite Complete Lower Receiver
    0 out of 5
    Starting at: $499.99
    Select options This product has multiple variants. The options may be chosen on the product page
    Add to wishlist
    Quick View

  • Tech Lower Tomahawk 1Tech Lower SBA 3
    MORE TRIGGERS, STOCKS / BRACES. & LOGOS
    AR-15 Accessories, Complete Lower Receivers, Upper & Lower Receivers/Builder Kits

    Tech Complete Lower Receiver
    0 out of 5
    Starting at: $329.99
    Select options This product has multiple variants. The options may be chosen on the product page
    Add to wishlist
    Quick View

  • Tech Receiver Combo 1.2Tech Receiver Combo 2
    AR-15 Accessories, FosTecH Firearms Accessories, Upper & Lower Receivers/Builder Kits

    Tech Upper and Lower Receiver Set
    0 out of 5
    $169.99
    Add to cart
    Add to wishlist
    Quick View

fostech_inc
SOF week with @global_ordnance and @takeongravity SOF week with @global_ordnance and @takeongravity
The Origin12, but make it OD Green. The Origin12, but make it OD Green.
The Drone Predator The Drone Predator
An oldie but a goodie.. Always a good time filmin An oldie but a goodie.. Always a good time filming with our buddy Iraqvet8888
SOF week brought the heat, great to see the Origin SOF week brought the heat, great to see the Origin12 making waves in Tampa #sofweek2025
An insider’s look into the .50 bmg drums being b An insider’s look into the .50 bmg drums being built!
What’s the secret to our roughly 5lb rifles? Mag What’s the secret to our roughly 5lb rifles? Magnesium-aluminum alloy… it’s something you have to pick up to beileve, and it’s 30% stronger than aircraft-grade aluminum.
Come with us to shoot the 7.5in Stealth Raptor Pis Come with us to shoot the 7.5in Stealth Raptor Pistol with the @gearheadworks tailhook brace
Follow on Instagram

Making the world safer, one firearm at a time.®

Subscribe to the FosTecH newsletter for our latest offers!

Contact Us

SUBSCRIBE on YOUTUBE!
Facebook Instagram X-twitter Youtube

CALL

(812) 445-4028

EMAIL

sales@FosTecH.us

VISIT

320 Myers Street
Seymour, IN 47274

OPEN

Monday-Friday
8:00am-4:00pm Eastern

Shop FosTecH

  • Shop All Products
  • Origin Shotguns
  • Handguns
  • Build Your AR

Help & Support

  • Documents, Manuals, & Patents
  • Customer Service & Warranties
  • Video Resources
  • Dealer Locator

Information

  • Become a Dealer
  • N.F.A.
  • Military & L.E.
  • First Responder Program
  • Wholesale Partners
  • Terms & Conditions
  • Photo Galleries
  • About Us
  • Contact FosTecH

Featured Product

  • POPULAR
    Echo AR II Trigger
    AR15 Triggers, Echo Triggers

    Echo AR II Trigger
    5.00 out of 5
    $479.99
    Add to cart
    Add to wishlist
    Quick View

FosTecH, Inc. © 2025. All Rights Reserved
Website developed by P.TEN Marketing
has been added to your cart.
Checkout
  • FosTecH Products
  • Other Information
  • Home
  • Rifles/SBR/Braced Pistols
    • Shop by Series
      • Stealth
      • Flite
      • Tech
    • Shop by Caliber
      • 5.56
      • 9mm
      • .300 Blackout
      • .22 Long Rifle
    • Shop by Type/Purpose
      • Long Range Rifles
      • 16″ Barrel Rifles
      • Short Barrel Rifles
      • Braced Pistols
    • Build Your AR
    • AR-15 Parts & Accessories
  • Origin Shotguns
    • Origin Shotguns
    • Origin-12 Accessories
  • Handguns
  • Echo Triggers
    • Echo Triggers
    • Echo Replacement Parts
      • Echo AR II Trigger
      • Echo Sport Trigger
      • Echo AK Trigger
  • Accessories
    • Drums
    • Origin-12 Accessories
    • Drone Handguns
      • Predator Sig 320 Parts
    • AR-15 Parts & Accessories
      • Triggers
      • Quad Rails/Handguards
      • Stocks, Grips, Braces, & Folding Adapters
      • Upper & Lower Receivers/Builder Kits
      • Upper & Lower Parts
      • Complete Upper Receivers
      • Complete Lower Receivers
      • Caliber Conversion Kits
      • AR Lightweight Components
      • All AR-15 Parts & Accessories
    • AK Parts & Accessories
    • Sights & Optics
    • M Lock/Picatinny Mounts, Rails & Slings
    • Gun Cases, Racks, Vehicle Mounts, etc.
  • Packages & Sets
  • Ammo
  • Merch
  • FoxholeSALE
  • Videos
  • Photos
  • Documents
  • Dealers
    • Dealer Locator
    • Become a Dealer
    • Dealer Login
  • NFA/Military/First Responder
    • N.F.A.
    • Military & L.E.
    • First Responder Program
  • Wholesale
  • About
  • Contact
Join the FosTecH Waitlist We will inform you when the product arrives in stock. Please leave your valid email address below.