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"
Frequently Built With
Based on build data
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Aero Precision Ar-15 5.56 Bcg W/c158 Bolt - Aero Logo - Phosphate
Bolt Carrier Group
Wilson Combat Ar-15 Billet Upper Receiver
Upper Receiver
Aero Precision Stainless Steel Gas Tube - Mid-Length
Gas Tube
Geissele Automatics Llc Ar-15 16 Super Duty Stripped Upper Receiver Ddc
Aero Precision Stripped M4e1 Ar-15 Lower Receiver - Special Edition - Freedom
Lower ReceiverBuild 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.
76.9%
AR-1576.9%
AR-1023.1%
CaliberBased on real build data showing which calibers builders choose alongside this product.
100%
5.56 NATO100%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
100%
Mid-Length100%
| Product | Category | Times Built Together |
|---|---|---|
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | 6 | |
| Aero Precision Ar-15 5.56 Bcg W/c158 Bolt - Aero Logo - Phosphate | Bolt Carrier Group | 6 |
| Wilson Combat Ar-15 Billet Upper Receiver | Upper Receiver | 5 |
| Aero Precision Stainless Steel Gas Tube - Mid-Length | Gas Tube | 5 |
| Geissele Automatics Llc Ar-15 16 Super Duty Stripped Upper Receiver Ddc | 5 | |
| Aero Precision Stripped M4e1 Ar-15 Lower Receiver - Special Edition - Freedom | Lower Receiver | 4 |
| Platform | Percentage |
|---|---|
| AR-15 | 76.9% |
| AR-10 | 23.1% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 100% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 100% |
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 | $1446.10 |
 | 13 | $1383.75 |
 | 11 | $1673.22 |
 | 25 | $1023.44 |
 | 9 | $2843.06 |
| 11 | $1229.46 |
 | 9 | $3619.83 |
 | 16 | $1559.84 |
 | 18 | $2254.75 |
 | 23 | $1301.52 |
 | 24 | $2242.45 |
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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