The CMMG AR-15 Pistol Grip Screw 55CA563 (UPC 810046231241) is a small but essential OEM component designed to securely attach your pistol grip to any mil-spec AR-15 lower receiver. Whether you’re completing a new build, swapping grips, or refreshing worn hardware, this CMMG grip screw gives you a reliable, factory-spec fastener that’s made to fit and stay tight.
Key Features – CMMG AR-15 Pistol Grip Screw 55CA563
Manufacturer: CMMG
Part Number (MPN): 55CA563
UPC: 810046231241
Application: AR-15 pistol grip mounting screw
Fitment: Designed for mil-spec AR-15 lower receivers and compatible pistol grips
Role: Secures the pistol grip to the receiver while retaining the safety selector detent and spring
OEM-Grade Grip Screw for Mil-Spec AR-15 Lowers
This CMMG pistol grip screw is built for standard AR-15 platforms, making it ideal for:
New AR-15 rifle or pistol builds
Swapping out factory grips for aftermarket options
Replacing a stripped, worn, or lost grip screw
Because it’s an OEM CMMG part, you’re getting a screw designed specifically to work with typical AR-15 lowers and grips—not a random hardware-store substitute. That means:
Proper length to engage receiver threads securely
Correct head style and size to sit properly in most AR grip recesses
Reliable function with the selector detent spring that lives in the grip
Perfect for Grip Upgrades and Maintenance
If you’ve ever upgraded your AR-15 grip, you know the grip screw and washer are critical for a solid, no-wobble install. Over time, screws can strip, corrode, or simply disappear in the shop. Keeping a dedicated CMMG AR-15 Pistol Grip Screw on hand is smart for:
Installing popular ergonomic or rubberized grips
Refreshing older rifles with new furniture
Armorer benches, builders, and home gunsmiths who frequently work on AR platforms
This screw is the finishing piece that makes sure your grip swap ends in a tight, secure fit instead of a wobbly, half-threaded mess.
Consistent, Secure Attachment
A proper pistol grip screw does more than just hold the grip on—it also helps retain the selector detent and spring inside the lower receiver. Using the right-length, quality screw helps ensure:
Consistent trigger and safety feel – the selector detent is held with the correct tension
No wobble in the pistol grip, even under recoil and heavy use
Long-term durability – fewer chances of stripping or backing out over time
If your safety selector feels mushy or your grip feels loose, an inspection and potential replacement of the grip screw is a simple troubleshooting step.
Ideal for Spare Parts Kits and Build Benches
Like firing pin retaining pins, takedown detents, and springs, a grip screw is one of those small parts that always seems to go missing mid-build. Adding the CMMG AR-15 Pistol Grip Screw 55CA563 to your parts kit means you’re prepared when:
Building out multiple lowers
Helping friends assemble or fix rifles
A factory grip screw gets damaged during removal
For the low cost and tiny amount of space it takes up, it’s a must-have item for any AR-15 owner who likes to tinker or build.
Specifications – CMMG AR-15 Pistol Grip Screw 55CA563
Product Type: Pistol grip mounting screw for AR-15
Platform: AR-15 / M4 style lower receivers
Manufacturer: CMMG
Part Number: 55CA563
UPC: 810046231241
Function: Secures pistol grip and retains selector detent spring
Use Case: Replacement or build component for standard AR-15 grips
(Note: Specific thread pitch and finish may vary by production batch; this screw is intended as a direct, mil-spec-style replacement for CMMG and compatible AR-15 lowers.)
Why Choose the CMMG AR-15 Pistol Grip Screw?
If you’re serious about your AR builds, you know the little parts matter. The CMMG AR-15 Pistol Grip Screw 55CA563 gives you:
A factory-spec solution from a trusted AR manufacturer
Reliable fit for most mil-spec AR-15 lowers and grips
A simple, affordable way to fix or finish your rifle correctly
Whether you’re completing a brand-new AR-15, upgrading to a better grip, or stocking your small-parts bin, this CMMG grip screw is the tiny component that makes a big difference in how solid your rifle feels in hand.
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