AR-15 Rifle Kits

AR-15 Rifle Kits — Complete Build Kits for Every Builder

Build with confidence. Our AR-15 rifle kits bundle matched components — barreled uppers, BCGs, charging handles, handguards, lower parts kits, and buffer assemblies — so you get a reliable rifle-ready setup without the headache of part-matching.

Shop All Rifle Kits → /ar-15/rifle-kits

(Note: kits typically do not include the stripped lower receiver, which must be purchased separately through an FFL.) For more details, see the ATF’s guide on firearm regulations 

Why Choose AR15-Overstock Rifle Kits

  • Save time & money: Bundled kits cost less than buying comparable parts individually.

  • Parts matched for reliability: We pair barrels, gas systems, and handguards so your build runs smoothly.

  • Multiple configurations: Choose barrel length, gas system, caliber, and finishes to suit duty, range, or hunting needs.

  • Easy to install: Kits are assembled for fast installation by DIY builders or gunsmiths.

Shop Budget Rifle Kits → /ar-15/rifle-kits/budget

What’s Included in Our Rifle Kits

Most of our AR-15 rifle kits include:

  • Barreled upper receiver (barrel, gas block, gas tube)

  • Complete bolt carrier group (BCG) and charging handle

  • Handguard / rail system and muzzle device

  • Lower parts kit (LPK) — trigger, springs, pins, selector, etc.

  • Buffer, buffer spring, and stock (where applicable)

Important: The stripped lower receiver is usually not included and must be purchased separately through an FFL. 

Find the Right Rifle Kit for Your Build

Beginner / Budget Builds

  • 16" government-profile barrels, mil-spec parts, reliable and wallet-friendly.
    Shop Budget Rifle Kits → /ar-15/rifle-kits/budget

Tactical / Compact Builds

  • Shorter barrels and appropriate gas systems for compact handling and accessory-ready handguards.
    Shop Compact Rifle Kits → /ar-15/rifle-kits/compact

Precision / Match Builds

  • Upgraded barrels, enhanced triggers, and adjustable components for accuracy-focused shooters.
    Shop Precision Rifle Kits → /ar-15/rifle-kits/precision

How to Choose Barrel & Gas System

  • Match barrel length to the correct gas system (pistol, carbine, mid-length, rifle).

  • Pick barrel material and finish (chrome-lined, nitride, stainless) based on use and budget.

Barrel Length & Gas System Guide → /guides/barrel-lengths

For general technical firearm terms, visit the ATF Firearms Definitions page 

Buying Guide — Quick Checklist

Before you buy a rifle kit, confirm:

  • Full parts list (BCG, charging handle, barrel, handguard, LPK, buffer assembly included)

  • Barrel specs: length, twist rate, finish

  • Gas system length matches the barrel length in the kit

  • Return policy & warranty information

  • Whether you need a stripped lower receiver (FFL required)

 Return Policy → /help/returns

Frequently Asked Questions (FAQ)

Q: Do your AR-15 rifle kits include the lower receiver?
A: No. Most kits ship without the stripped lower receiver. The lower must be purchased separately through an FFL.

Q: Are these kits compatible with standard AR-15 parts?
A: Yes — our kits use standard AR-15 dimensions and interfaces so aftermarket upgrades are widely compatible.

Q: Can I convert a rifle kit to a pistol configuration?
A: Some kits can be configured differently depending on barrel length and whether the kit includes a stock or stabilizer. Check the product details for configuration options.

Q: What laws apply to building an AR-15 rifle?
A: Regulations vary by state. For official information, check your state firearm laws directory (opens in new tab).

Related Resources

Ready to Build?

Start your build today — browse our full selection of AR-15 rifle kits and find the perfect kit for your next project.

? Shop Rifle Kits Now → /ar-15/rifle-kits

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