The Colt .755" Handguard Cap Steel Black 64672 is a genuine Colt OEM part designed to securely capture the front of your AR-15 handguards and provide a clean, factory-correct interface at the gas block/front sight base. Built from durable black-finished steel and sized for .755" barrel journal setups, this handguard cap is ideal for maintaining or building Colt AR-15 Match Target Lightweight and 7.62x39 AR-15/M16 platforms.
Whether you’re restoring a Colt rifle, finishing a correct clone build, or upgrading a budget upper with real Colt small parts, the Colt .755" Handguard Cap Steel Black gives you the proper fit, strength, and look that serious AR owners expect.
Key Features – Colt .755" Handguard Cap Steel Black 64672
Manufacturer: Colt
Model / Type: .755" AR-15/M16 handguard cap
Material: Steel – strong, rigid, and heat-resistant
Color / Finish: Black (parkerized-style protective finish)
Barrel Step Size: .755" – for compatible Colt barrel profiles
MFR Part Number: 64672
Brownells # / SKU: 160301762
Approx. Dimensions: 1.658" x 1.658" x 0.370"
Weight: ~0.02 lb / 0.009 kg
Country of Origin: Made in USA
Designed for AR-15 Match Target Lightweight & 7.62x39 Builds
Colt and multiple distributors specifically note that this .755" handguard cap is designed to fit:
In practice, that makes this cap ideal for:
Factory Colt Match Target Lightweight rifles needing replacement handguard hardware
7.62x39 AR-15 builds using Colt or Colt-profile barrels with a .755" gas block/step
Clone-style builds where correct Colt small parts are important for authenticity
Because it’s an OEM Colt part, you get a cap that lines up properly with standard rifle and carbine two-piece handguards designed for this diameter and profile.
Robust Steel Construction for Heat & Impact Resistance
Handguard caps sit right behind the gas block or front sight base, taking constant heat from the gas system and contact from the handguards. Colt builds this cap from robust steel, then finishes it in black for extra protection.
Benefits of the steel, black-finished construction:
Excellent heat resistance under rapid fire and sustained strings
Impact and crush resistance when handguards are installed/removed or the rifle is used hard
Corrosion resistance thanks to the protective black finish, especially when properly oiled
If you’re running your AR for training, duty, or serious range use, a quality steel handguard cap avoids flex and deformation that can lead to loose or misaligned handguards.
Secure, Factory-Correct Handguard Retention
The handguard cap works with your delta ring / end cap system to trap the front lips of traditional two-piece handguards (M4, rifle, or similar depending on your setup).
With the Colt .755" cap properly installed, you get:
Tight, rattle-free fit for standard two-piece handguards
Proper alignment of the handguards with the barrel and gas system
A clean, finished front end at the gas block/front sight base
Brownells highlights this Colt .755" handguard cap as a secure fit that enhances rifle performance when paired with the correct AR-15 Match Target Lightweight and 7.62x39 configurations.
Compatible with AR-15, M16, and AR-15/M4 Platforms
Brownells and international Brownells sites list the .755" cap as compatible with:
As long as your barrel’s front shoulder and gas block seat are cut to the .755" handguard cap dimension, this part will:
Always confirm your barrel profile (.625, .750, .755, etc.) before ordering, as handguard caps are diameter-specific.
Ideal for Builds, Restorations & Upgrades
The Colt .755" Handguard Cap Steel Black 64672 is an excellent choice in several scenarios:
1. Colt Factory & Clone Builds
If you’re building or repairing a Colt Match Target Lightweight or Colt 7.62x39 AR, using the correct Colt handguard cap ensures your front handguard interface is truly factory-spec.
2. Restoring Older Colt Rifles
For older rifles where the original cap is bent, rusted, or missing, this OEM replacement brings the rifle back to its correct configuration with the proper .755" dimension.
3. Upgrading Budget Uppers
If you’re swapping out an unknown or soft metal handguard cap on a budget upper, upgrading to Colt steel hardware increases overall durability and maintains correct alignment for your handguards.
Compact, Lightweight & Easy to Install
Despite being built from solid steel, this handguard cap remains extremely light (about 0.02 lb) and compact (1.658" x 1.658" x 0.370"), so it doesn’t meaningfully alter rifle balance.
Installation typically involves:
Removing the muzzle device and front sight base/gas block.
Sliding the old cap off and the new Colt .755" cap into place.
Reinstalling the gas block/front sight base and muzzle device, then reinstalling your handguards.
For best results—especially on pinned front sight bases or duty rifles—many shooters prefer to have a qualified AR armorer or gunsmith perform the installation and verify alignment.
Technical Specifications – Colt .755" Handguard Cap Steel Black 64672
Based on Colt and major distributor data:
Product Name: Colt .755" Handguard Cap Steel Black
Manufacturer: Colt’s Manufacturing Company
MFR Part Number: 64672
Brownells # / SKU: 160301762
Material: Steel
Color / Finish: Black
Dimensions:
Length: 1.658"
Width: 1.658"
Height: 0.370"
Weight: Approx. 0.02 lb (0.009 kg)
Fits:
AR-15 Match Target Lightweight
AR-15 / M16 / AR-15 M4 in .755" handguard cap configuration
7.62x39 Colt-pattern ARs with compatible barrel shoulder
Country of Origin: Made in USA
Why Choose the Colt .755" Handguard Cap Steel Black 64672?
If you’re serious about correct fit, durability, and OEM quality on your AR-15, the Colt .755" Handguard Cap Steel Black 64672 is the clear choice:
Genuine Colt OEM part with proper .755" geometry
Steel, black-finished construction for long-term strength and corrosion resistance
Specifically designed for AR-15 Match Target Lightweight and 7.62x39 Colt platforms, with broad AR-15/M16 compatibility when the barrel step matches
A simple, inexpensive part that has a big impact on handguard alignment, feel, and long-term reliability
For Colt enthusiasts, AR builders, armorers, and anyone upgrading their front-end hardware, this handguard cap is the right way to finish your rifle the Colt way.
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