AR-15 LPK Pistol Grip Screw

Description

OVERVIEW – MIL-SPEC REPLACEMENT SCREW FOR SECURE GRIP MOUNTING

The AR-15 LPK Pistol Grip Screw is the small but essential fastener that secures your pistol grip to your lower receiver. If you lost this screw during a lower build, bought a grip that came without hardware, or are replacing a stripped or damaged screw, this mil-spec replacement gets your build back on track with a secure, wobble-free fit. While it may seem like a minor part, the pistol grip screw is critical for safety and function — a loose or incorrect screw can cause your grip to shift, wobble, or even detach under recoil, affecting your control of the rifle and creating an unsafe shooting condition.

This screw is manufactured to the exact mil-spec dimensions required for all standard AR-15 lower receivers: 1/4-28 thread pitch, 1-inch length, with a socket head cap design that accepts a standard 3/16″ Allen wrench. The coarse knurled outer head provides additional grip and a classic factory look, while the internal hex drive ensures you can torque it properly without stripping like Phillips or slotted screws. Made from high-strength carbon steel and finished with a durable black oxide coating, this screw resists corrosion, wear, and rust while matching the finish of your lower receiver components. It threads directly into the lower receiver’s grip screw hole and secures through the bottom of any standard AR-15 pistol grip, including A2, MOE, enhanced, and most aftermarket grips that use standard mounting. Whether you are finishing an 80% lower, assembling a complete lower parts kit, or keeping spare hardware on your workbench, this replacement screw ensures your pistol grip stays locked in place shot after shot.

WHY CHOOSE THIS AR-15 LPK PISTOL GRIP SCREW

The tiny part that holds your whole grip together.

1. Exact Mil-Spec 1/4-28 x 1″ Dimensions for Universal AR-15 Compatibility: AR-15 lower receivers are all tapped with a 1/4-28 thread in the pistol grip mounting hole — this screw is cut to that exact spec. The 1/4-28 pitch provides strong thread engagement and resistance to loosening under vibration and recoil, while the 1-inch length is the standard length that provides full engagement in the receiver without bottoming out or protruding. The screw head diameter and height are sized to seat correctly inside the recess at the bottom of AR-15 pistol grips, preventing it from sticking out or interfering with storage compartments. The socket head cap design uses a 3/16″ hex Allen key, which is the standard tool for AR-15 grip screws, allowing you to apply proper torque (around 15-20 in-lbs is typical) without rounding off the head. This screw fits all standard AR-15, M4, M16, and AR-10 lowers that accept AR-15 style pistol grips — including forged, billet, and 80% lowers — and works with virtually all A2, MOE, enhanced, and aftermarket grips. If your grip wobbles or your old screw is lost, this is the correct replacement.

2. High-Strength Carbon Steel with Black Oxide Corrosion Resistance: This is not a hardware store screw that will strip, rust, or snap. It is manufactured from high-strength carbon steel and heat-treated for tensile strength, ensuring it will not stretch or break when torqued properly. The black oxide finish provides corrosion resistance against moisture, gun oils, and cleaning solvents, and gives the screw a professional, low-profile black appearance that matches your lower receiver and grip hardware. The threads are cleanly cut and precisely formed for smooth engagement without cross-threading, even in anodized aluminum receivers. The socket head is deep and precisely broached to prevent the Allen key from slipping and rounding out the hex — a common failure with cheap screws. This durability means you can remove and reinstall your grip multiple times for maintenance, grip swaps, or lower servicing without replacing the screw each time. It is built to last the life of your rifle.

3. Essential Spare for Lower Builds, LPK Completion, and Workbench Kits: Every builder has experienced the frustration of finishing a lower build only to realize the pistol grip screw is missing — it is one of the most commonly lost small parts in a Lower Parts Kit because it is packaged separately from the grip itself. This screw is also often not included when you buy an aftermarket pistol grip by itself, leaving you with a grip you cannot mount. Keeping a few of these screws on your workbench or in your range bag ensures you are never stuck mid-build. Installation is simple: insert the screw through the hole in the bottom of the pistol grip (with lock washer or star washer if you have one), align the grip with the lower receiver, and thread the screw into the receiver’s grip screw hole. Tighten with a 3/16″ Allen wrench until snug — do not over-torque. The secure fit prevents grip wobble, improves rifle control, and ensures your grip stays put under recoil, drops, and hard use. For armorers, builders, and anyone assembling AR-15s, this is a must-have replacement part.

SECURE YOUR GRIP WITH THE CORRECT MIL-SPEC SCREW

The AR-15 LPK Pistol Grip Screw delivers proper thread engagement, strength, and black oxide durability for a secure pistol grip installation.

SPECIFICATIONS

Type: AR-15 LPK Pistol Grip Screw – Replacement Hardware. Thread: 1/4-28 x 1″ Long. Head Style: Socket Head Cap / Allen Hex Drive – 3/16″ Allen Key. Material: High-Strength Carbon Steel. Finish: Black Oxide. Compatibility: All Standard AR-15 / M4 / M16 / AR-10 Lower Receivers and AR-15 Style Pistol Grips (A2, MOE, Enhanced, Aftermarket). Function: Secures Pistol Grip to Lower Receiver.