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Criterion Barrels
Overview
The Criterion Barrels Inc 20" Hybrid Contour barrel features a 20-inch length with an M4 profile, designed to accommodate the .223 Wylde caliber, which allows for safe chambering of both .223 Remington and 5.56 NATO cartridges. With a rifle-length gas system and a .750 gas block diameter, this barrel promotes reliable cycling while maintaining accuracy, aided by a 1:8 twist rate that stabilizes a variety of bullet weights. This barrel is commonly found in builds that utilize a rifle-length gas system and favor the versatility of the .223 Wylde caliber.
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 |
|---|---|
| .223 Wylde | 100% |
| Gas System | Percentage |
|---|---|
| Rifle | 100% |
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