ing to build an AR-15 pistol without breaking the bank? At AR15-Overstock, we carry reliable AR-15 pistol kits under $400 that let you build your firearm with confidence. Whether you’re after a compact 5.56 setup or a budget-friendly 9mm build, these kits provide everything you need — minus the stripped lower receiver — at an unbeatable price.

Shop all AR-15 pistol kits under $400 here → [ar15 pistol kits]

Why Choose a Pistol Kit Under $400?

• Affordable entry point: Great for first-time builders or anyone looking to add another AR pistol to their collection.

• Complete packages: Kits typically include a barreled upper, BCG, charging handle, handguard, lower parts kit, buffer assembly, and stabilizer.

• Easy customization: Choose your barrel length, caliber, and finish to match your shooting style.

• DIY savings: Building from a kit often costs less than buying a complete firearm.

Our Top Budget-Friendly Options

 5.56 NATO Pistol Kits

• Compact 10.5″–11.5″ barrel options for balanced performance.

• Perfect for range shooting, training, and personal defense.
  Shop 5.56 Pistol Kits → [ar-15 pistol-kits]

 9mm Pistol Kits

• Affordable and fun to shoot — great for plinking or budget builds.

• Uses less expensive ammo, keeping your range time costs low.
  Shop 9mm Pistol Kits → [/ar-15/pistol-kits/9mm]

 Blemished / Clearance Kits

• Cosmetic blemishes = lower price without sacrificing function.

• Ideal for budget-conscious builders who want reliable performance at the best possible cost.
  Shop Blemished Kits → [blemished kits]

What to Check Before Buying

• Included parts: Confirm BCG, charging handle, barrel, LPK, buffer assembly, and stabilizer are all included.

• Barrel specs: Length, twist rate, and finish determine accuracy and durability.

• Compliance: Ensure your chosen configuration aligns with state and federal laws.

Final Thoughts

A quality AR-15 pistol kit under $400 is the perfect way to get started with your build. At AR15-Overstock, we stock budget-friendly kits that don’t cut corners on reliability. From 5.56 NATO to 9mm builds, our kits are built to perform without draining your wallet.

Ready to build your AR pistol? Browse our full collection of affordable AR-15 pistol kits here → ar15 pistol kits