LBE Unlimited Lower Parts Kit — .223 Rem / 5.56 NATO — Black Finish — Without Trigger Guard or Pistol Grip (Model ARK15LPK / AR15LPK, UPC: 765857617275)

Build, upgrade, or repair your AR-15 lower receiver with confidence using the LBE Unlimited Lower Parts Kit (LPK)—a complete, budget-friendly assembly of mil-spec components for .223 Rem / 5.56 NATO platforms. Finished in durable black and engineered to meet common AR-15 spec tolerances, this kit supplies the essential pins, springs, and controls you need to finish a receiver, restore a range rig, or keep spares on hand. Note: This kit ships without a trigger guard or pistol grip—ideal for builders who want to choose their preferred ergonomic or aftermarket options.

Overview — What the AR15LPK Offers

The LBE Unlimited ARK15LPK / AR15LPK is designed for anyone assembling or refurbishing a mil-spec AR-15 lower receiver. It’s a practical, value-oriented kit with black-finished hardware that fits standard AR-15 lowers compatible with .223 Remington / 5.56 NATO specifications. Whether you’re a DIY builder, gunsmith, or armor-minded shooter, this kit gives you the mounting hardware and small parts that make a lower perform reliably.

Why Choose This Lower Parts Kit?

• Complete core parts for a functioning lower (minus trigger guard & grip).

• Mil-spec compatibility for broad fit across commercial and mil-spec lowers.

• Black finish for corrosion resistance and a low-glare tactical look.

• Cost-effective option for builders who want quality components without premium markup.

• Great for spares — ideal to have on hand for repairs and field replacement.

Typical Contents (What's Included)

This LPK supplies the standard parts most builders expect. Exact packaging may vary, but typical contents include:

• Hammer and hammer spring

• Trigger and trigger spring

• Disconnector and disconnector spring

• Safety selector (ambidextrous or single side may vary by batch) and selector detent spring

• Bolt catch and bolt catch roll pin

• Magazine catch, magazine catch spring, and magazine catch button

• Takedown pin and pivot pin (with corresponding detents & springs)

• Trigger guard pins (note: no trigger guard included)

• Assorted roll pins, detents, and springs required for assembly

• Buffer retainer and buffer retainer spring

Not included: Trigger guard and pistol grip (buyer supplies preferred styles).

Compatibility & Fitment

• Platform: AR-15 lower receivers

• Caliber: .223 Rem / 5.56 NATO (parts are caliber-agnostic for lower components)

• Standards: Designed to match Mil-Spec dimensions — compatible with most standard commercial & mil-spec lowers and most brands of small parts and controls.

• Note: Verify receiver spec (commercial vs. mil-spec tolerances) before final assembly for perfect fitment—some precision receivers or aftermarket parts may require hand fitting.

Materials & Finish

• Finish: Black corrosion-resistant coating (protects parts from rust and wear while maintaining a low reflective profile)

• Materials: Heat-treated steels for high-stress parts (hammer, trigger components), hardened pins and springs specified to withstand repeated cycling

Installation & Armorer Tips

• Use proper armorer tools (punch set, roll-pin starter, small hammer, vise blocks) to avoid damaging pins and receiver surfaces.

• Follow a standard build checklist: install takedown/pivot pins, bolt catch, safety selector and detent, trigger/disconnector/hammer group, magazine catch, buffer retainer, and any included pins.

• Light lubrication on contact surfaces promotes smooth operation.

• After assembly, perform full functional checks (trigger reset, safety selector, bolt catch engagement) and conduct a supervised live-fire verification at a range to confirm reliable operation.

• If you’re not comfortable assembling a firearm, consult a qualified gunsmith to ensure safe, legal, and correct installation.

Ideal For

• First-time AR builders who want a reliable starter parts kit (with flexibility to add their preferred trigger guard and grip).

• Gunsmiths and armorers stocking common replacement parts.

• Shooters repairing or refreshing a lower receiver after heavy use.

• Range owners and training programs needing economical spares.

Quality & Value

LBE Unlimited’s AR15LPK offers builders a balance of value and functionality—durable components where it matters, in a convenient kit that keeps your project moving. The omission of the trigger guard and pistol grip gives you the freedom to pair the kit with a variety of OEM or aftermarket ergonomics and accessories without waste.

Safety & Legal Reminder

Always follow local, state, and federal laws when assembling, modifying, or owning firearms. Ensure the receiver is legally permitted in your jurisdiction and that you are legally authorized to perform assembly. Always clear the firearm and double-check for an unloaded chamber before maintenance. If unsure about legal requirements or armorer procedures, seek guidance from a licensed gunsmith or legal authority.

Specifications (At-A-Glance)

• Model: ARK15LPK / AR15LPK

• UPC: 765857617275

• Platform Compatibility: AR-15 (.223 Rem / 5.56 NATO)

• Finish: Black

• Includes: Lower small parts kit (see "Typical Contents") — excludes trigger guard and pistol grip

• Manufacturer: LBE Unlimited

Final Thoughts

Whether you’re finishing a custom build, refreshing a worn lower, or stocking spare parts for the armory, the LBE Unlimited Lower Parts Kit (AR15LPK) gives you the mil-spec components needed to complete a reliable AR-15 lower. Durable finishes, hardened components, and broad compatibility make this kit a practical, cost-effective choice for builders, armorers, and firearm enthusiasts who want consistent performance and the freedom to choose their preferred ergonomics.

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