Colt AR-15 A4 Fixed Stock – OEM Black Rifle Stock Assembly – 64574
Manufacturer: Colt • Model/Part #: 64574 • Color: Black • Style: Fixed A4 Rifle Stock • Platform: AR-15 / M16 Rifle-Length
Give your AR-15 the classic, duty-proven A4 feel with the Colt AR-15 A4 STOCK FIXED OEM BLK 64574. This is a genuine Colt factory rifle stock, built to mil-spec dimensions for rifle-length receiver extensions, offering rock-solid durability, a stable cheek weld, and that unmistakable A4/M16 look and feel. Whether you’re restoring a service-style rifle, upgrading a build, or replacing a worn stock, this OEM Colt part delivers authenticity and reliability you can trust.
Genuine Colt OEM A4 Fixed Rifle Stock
This isn’t an aftermarket clone—it’s a Colt factory A4 stock:
Designed to replicate the M16A4 / AR-15 A4 fixed rifle stock configuration used on service-style rifles.
Manufactured to Colt’s mil-spec standards, ensuring consistent fit, finish, and performance.
Ideal for retro builds, duty-style setups, and shooters who prefer the solid feel of a fixed stock over collapsible options.
If you want a rifle that feels like a true A4, starting with a genuine Colt fixed stock is the right move.
Fixed Rifle-Length Design – Stable, Consistent, Reliable
The Colt A4 stock is built around a rifle-length receiver extension (buffer tube) system:
Fixed stock design offers a consistent length of pull and rock-solid shoulder weld, ideal for precision and repeatability.
Compatible with standard AR-15/M16 rifle-length buffer systems (not carbine-length).
Provides a more traditional rifle feel, favored by many for prone, benchrest, and distance shooting.
For shooters who appreciate consistency and stability over adjustability, the A4 stock remains a popular choice.
Durable Black Polymer Construction
Built to withstand duty and field use, this Colt stock uses a proven synthetic construction:
High-strength black polymer body resists impact, abrasion, and environmental extremes far better than cheap knockoffs.
Designed for hard use on the range, in training, and in harsh weather, without warping or cracking.
Matte black finish matches typical AR upper/lower receivers and other mil-spec furniture for a cohesive look.
This is a stock meant to be used—not babied.
Classic A4 Ergonomics & Cheek Weld
One of the main reasons shooters still love the A4 stock is its ergonomic simplicity:
Straight-line, rifle-length stock design aligns well with the AR’s bore axis, helping mitigate muzzle rise.
Offers a broad, comfortable cheek weld that works well with iron sights and many magnified optics mounted at standard height.
The fixed length encourages a consistent mount, which translates into more repeatable shots and better muscle memory.
It’s simple, predictable, and time-tested—exactly what many shooters want in a serious rifle.
Ideal for Service-Style Builds, SPRs & Precision Setups
The Colt AR-15 A4 Fixed OEM Stock 64574 is a great fit for a wide range of builds:
Service-style M16A4/AR-15 A4 clones for collectors, service rifle competition, or nostalgia.
SPR/DMR-style rifles (Special Purpose Rifle / designated marksman builds) where a fixed stock can offer more consistent ergonomics.
Bench and prone-focused rifles where comfort, stability, and repeatable cheek weld take priority over compactness.
If your AR is more about precision and consistency than collapsing for transport, the A4 stock makes perfect sense.
Straightforward Installation
Installing a fixed A4 stock is well within reach for most AR builders:
Designed to work with rifle-length buffer tube, buffer, and spring (sold separately if not already installed).
Typically attaches to the lower receiver using a rifle-length receiver extension and standard hardware.
If you’re converting from a carbine stock, you’ll need the appropriate rifle-length buffer system to match.
If you’re unsure about compatibility or installation, consult a qualified armorer or gunsmith.
Key Features – Colt AR-15 A4 Fixed Stock, OEM Black (64574)
Brand: Colt
Model / Part Number: 64574
Type: Fixed A4 rifle stock
Color: Black
Construction: High-strength synthetic polymer
Platform: AR-15 / M16 with rifle-length buffer system
Fitment: Designed for rifle-length receiver extension (not carbine tubes)
Use Cases: Service-style builds, A4/M16 clones, SPR/DMR rifles, precision/bench rifles
(Exact included hardware may vary by retailer; verify whether buffer tube, buffer, and spring are included or sold separately.)
SEO-Focused Summary
The Colt AR-15 A4 STOCK FIXED OEM BLK 64574 is a genuine Colt fixed rifle stock designed for AR-15/M16 rifles using a rifle-length buffer system. Featuring durable black synthetic construction, a classic A4 profile, and mil-spec fit and ergonomics, this OEM Colt part is ideal for M16A4/AR-15 A4 clone builds, SPR and precision rifles, and shooters who prefer a stable, consistent fixed stock over collapsible options.
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