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Ballistic Advantage
Overview
The Ballistic Advantage AR-15 Modern Series 12.5 Carbine Barrel is a compact option designed for 5.56 NATO caliber rifles, featuring a Government profile that balances weight and rigidity. With a 1:7 twist rate, this barrel effectively stabilizes a wide range of bullet weights, while the .750 gas block diameter and carbine-length gas system ensure reliable cycling. This barrel is often found in builds that prioritize maneuverability and versatility, making it suitable for both tactical applications and close-quarters engagements.
Ballistic Advantage AR-15 Modern Series 12.5 Carbine Barrel Gov't
Ballistic Advantage AR-15 Modern Series 12.5 Carbine Barrel Gov't was the seventh most added barrel on GunPartPicker in August 2026, behind the Ballistic Advantage Performance Series 5.56 Hanson Mid-Length 3 Gun AR-15 Barrel With Pinned Gas Block - 17.7", with about 3% of all barrels added to builds. Up from #9 in July. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.
It was in stock most days in August 2026, and today 10 of the 12 retailers we track have it in stock. It dipped to $93.12 at Optics Planet for a stretch in August 2026, well under its usual $142.50, so sales do come around. Buying today, the lowest price is $93.12 at Optics Planet, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every barrel by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Barrel Length & Brand Report →The part most often added in each category by the 68 builds that include this one
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002
Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
PSA AR-15 Bolt Carrier Group 5.56 Full-Auto Nitride MPI - 516446953
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Builds in the community that include the Ballistic Advantage Ar-15 Modern Series 12.5 Carbine Barrel Gov't
| Build | Parts | Total |
|---|---|---|
 | 24 | $920.82 |
 | 19 | $3677.82 |
 | 27 | $3887.68 |
 | 7 | $1788.99 |
 | 11 | $1016.47 |
 | 25 | $2082.25 |
 | 20 | $1157.49 |
| 6 | $813.00 |
| 6 | $843.61 |
| 15 | $6765.43 |
1 global rating
Top reviews
Ballistic Advantage 12.5 inch carbine length government profile barrel has the profile I was after. Balances well in the build, not too front heavy. Carbine gas at 12.5 cycles reliably with most loads. Sub-MOA with match ammo.
