CMMG Fastback Receiver Extension Mil-Spec 55CA93E | AR-15 Mil-Spec Buffer Tube
Build a reliable and professional AR-15 with the CMMG Fastback Receiver Extension Mil-Spec 55CA93E. This high-quality mil-spec buffer tube is designed to provide a secure and stable platform for attaching adjustable stocks to your AR-15 or M4-style rifle. Manufactured by CMMG, a respected name in the firearms industry, the Fastback Receiver Extension offers precise dimensions that meet military specifications, ensuring compatibility with a wide range of mil-spec stocks and buffer systems. The 55CA93E model features CMMG’s signature Fastback design, which provides a smooth, contoured rear profile that improves comfort and aesthetics compared to traditional round buffer tubes. Whether you’re building a custom AR-15, upgrading an existing rifle, or assembling a duty-ready firearm, this receiver extension delivers the strength, fit, and finish that serious builders demand.
Why Choose the CMMG Fastback Receiver Extension?
The CMMG Fastback Receiver Extension Mil-Spec 55CA93E stands out from standard buffer tubes due to its refined design and superior manufacturing quality. Many budget receiver extensions suffer from inconsistent dimensions, rough finishes, or weak materials that can lead to stock wobble or premature wear. CMMG’s Fastback model is machined to exact mil-spec tolerances, ensuring a tight, secure fit with mil-spec collapsible stocks. The distinctive Fastback profile not only enhances the visual appeal of your build but also provides a more comfortable cheek weld when shouldering the rifle. Made from high-strength aluminum and finished with a durable hardcoat anodizing, this receiver extension is built to withstand the rigors of regular use. For AR-15 builders who value both performance and aesthetics, the CMMG 55CA93E offers an excellent balance of quality, compatibility, and refined design.
Key Features of the CMMG Fastback Receiver Extension 55CA93E
- Mil-Spec Dimensions – Manufactured to military specifications for reliable compatibility.
- Fastback Design – Contoured rear profile for improved comfort and modern aesthetics.
- High-Strength Aluminum – Durable construction built to handle repeated use.
- Hardcoat Anodized Finish – Provides excellent corrosion resistance and a professional appearance.
- Precision Machined – Tight tolerances ensure a secure fit with mil-spec stocks.
- Carbine Length – Compatible with standard carbine buffer systems and stocks.
- Model Number: 55CA93E
- UPC: 810046230572
Precision Mil-Spec Construction
The CMMG Fastback Receiver Extension 55CA93E is machined from high-quality aluminum to strict military specifications. This ensures consistent internal and external dimensions that allow for proper buffer and spring function while providing a rock-solid mounting platform for adjustable stocks. The hardcoat anodized finish adds an extra layer of protection against wear, corrosion, and the elements, making it suitable for both recreational and professional use. CMMG’s attention to detail during the manufacturing process results in a receiver extension that installs easily and performs reliably over time.
Fastback Design for Comfort and Style
One of the standout features of the CMMG Fastback Receiver Extension is its unique Fastback profile. Unlike traditional round buffer tubes, the Fastback design features a sloped, contoured rear that improves cheek weld comfort when using the rifle. This design also gives your build a more modern and streamlined appearance. The Fastback shape maintains full compatibility with standard mil-spec stocks while offering a noticeable improvement in ergonomics and aesthetics.
Product Specifications – CMMG Fastback Receiver Extension
- Brand: CMMG
- Product Type: AR-15 Receiver Extension / Buffer Tube
- Model Number: 55CA93E
- Length: Carbine Length
- Specification: Mil-Spec
- Material: High-Strength Aluminum
- Finish: Hardcoat Anodized
- Design: Fastback Profile
- UPC: 810046230572
- Best For: AR-15 Builds, Custom Rifles, Tactical Applications
Perfect for Custom AR-15 Builds
The CMMG Fastback Receiver Extension Mil-Spec 55CA93E is an excellent choice for builders looking to create a high-quality, professional-grade AR-15. Its mil-spec dimensions make it compatible with virtually all mil-spec collapsible stocks, while the Fastback design adds a distinctive touch to any build. Whether you’re assembling a home defense rifle, a competition carbine, or a duty-ready firearm, this receiver extension provides the solid foundation needed for a reliable and comfortable shooting experience.
Why Choose CMMG Components?
CMMG has earned a strong reputation in the firearms industry for producing high-quality AR-15 parts and complete rifles. Their commitment to precision manufacturing and consistent quality makes CMMG components a popular choice among serious builders and professionals. The Fastback Receiver Extension continues this tradition by offering a well-designed, durable, and aesthetically pleasing upgrade over standard buffer tubes.
Complete your AR-15 build with the CMMG Fastback Receiver Extension Mil-Spec 55CA93E. This high-quality carbine-length buffer tube features a refined Fastback profile, mil-spec dimensions, and a durable hardcoat anodized finish. Designed for compatibility with standard mil-spec stocks, the 55CA93E provides a secure mounting platform while enhancing both comfort and appearance. Whether you’re building a custom rifle or upgrading an existing AR-15, this receiver extension delivers the strength, precision, and professional quality that CMMG is known for. Add the CMMG Fastback Receiver Extension with UPC 810046230572 to your build and enjoy a reliable, well-crafted component that elevates your rifle’s performance and aesthetics.
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