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Colt
Overview
The Colt M4/M4A1 Replacement Barrel Assembly features a 14.5-inch M4 profile, designed specifically for the 5.56 NATO caliber, making it a solid choice for a variety of tactical applications. With a carbine-length gas system and a twist rate of 1:7, this barrel optimizes stability and accuracy for a range of bullet weights, ensuring reliable performance in fast-paced shooting scenarios. This barrel assembly is commonly found in builds focused on tactical or home defense applications, where compactness and maneuverability are essential.
Based on build data

Wilson Combat Ar-15 Billet Upper Receiver
Upper Receiver
BLEM PSA AR15 Complete Classic Stealth Lower, Black
Lower Receiver
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Gas Block
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Gas Tube
Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock
Lower ReceiverAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Wilson Combat Ar-15 Billet Upper Receiver | Upper Receiver | 153 |
| BLEM PSA AR15 Complete Classic Stealth Lower, Black | Lower Receiver | 146 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 144 |
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | Gas Block | 136 |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | Gas Tube | 132 |
| Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock | Lower Receiver | 118 |
| Platform | Percentage |
|---|---|
| AR-15 | 88.2% |
| AR-10 | 9.1% |
| AR-9 | 2.6% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 100% |
| Gas System | Percentage |
|---|---|
| Carbine | 100% |
Builds in the community that include the Colt M4/m4a1 Replacement Barrel Assembly 14.5in
| Build | Parts | Total |
|---|---|---|
![]() | 16 | $1158.83 |
![]() | 23 | $2015.86 |
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