B
Boscar420build quality is there
Reviewed on April 22, 2026Verified with Build
tight bore
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Aero Precision 5.56 Mid-Length AR-15 Barrel - Pinned Epsilon SL - 14.5"
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Aero Precision
Overview
The Aero Precision 5.56 Mid-Length AR-15 Barrel features a 14.5-inch M4 profile designed for 5.56 NATO caliber ammunition, making it a solid choice for precision and reliability. With a mid-length gas system, it offers a smoother shooting experience while maintaining optimal function, and the 1:7 twist rate stabilizes a wide range of bullet weights effectively. This barrel is commonly found in builds that prioritize a balance between maneuverability and accuracy, particularly those set up for tactical or competitive use.
Specifications
MPNAPRH101597
Barrel ProfileM4
Barrel Length14.5
Gas System LengthMid-Length
Thread Pitch1/2x28
Twist Rate1:7
CoatingQPQ/Nitride
Caliber5.56 NATO
Aero Precision 5.56 Mid-Length AR-15 Barrel - Pinned Epsilon SL - 14.5"
Available Merchants
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August 2026 on GunPartPicker
Aero Precision 5.56 Mid-Length AR-15 Barrel - Pinned Epsilon SL - 14.5" ranked #51 of the 298 barrels builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #26 of the 808 barrels builders have added. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on mid-length gas, and mostly AR-15 (75%, then AR-10 25%).
Updated · from real builds on GunPartPicker
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Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the 54 builds that include this one
Wilson Combat AR-15 Billet Upper Receiver
Upper Receiverin 11 builds
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Lower Receiver$155 · out of stockin 6 builds
Maximize Your AR-15's Potential with Tacfire's 15" ACE M-LOK Handguard - Black Excellence - HG20-15
Handguard$42in 5 builds
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Charging Handle$80 · out of stockin 7 builds
Aero Precision AR-15 5.56 BCG W/C158 Bolt - Aero Logo - Phosphate
Bolt Carrier Group$149 · out of stockin 12 builds
WMD Guns AR-15 Gas Tube Nitromet Mid-Length
Gas Tube$14in 11 builds
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
75%
AR-1575%
AR-1025%
Builds Featuring This Part
See all 11 →Builds in the community that include the Aero Precision 5.56 Mid-Length Ar-15 Barrel - Pinned Epsilon Sl - 14.5"
| Build | Parts | Total |
|---|---|---|
 | 12 | $1027.74 |
 | 13 | $1163.02 |
 | 11 | $1649.77 |
 | 25 | $840.05 |
 | 9 | $2854.85 |
| 11 | $968.18 |
 | 9 | $3551.83 |
 | 16 | $1477.51 |
 | 18 | $2020.22 |
 | 23 | $1098.02 |
 | 24 | $1753.75 |
Customer reviews
5.0out of 5
2 global ratings
Top reviews
F
FrankieHudman_69no regrets
Reviewed on February 15, 2026Verified with Build
ran a couple hundred rounds and it just keeps shooting. zero copper buildup so far
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