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Sons of Liberty Gun Works built the Precision SPR line for one thing: putting rounds on top of each other. This 16-inch barrel is the company's most accurate offering to date, and it earns that reputation by routinely shooting half-MOA groups with a variety of factory and match ammo. If you're chasing tight groups out of a gas gun rather than a bolt action, this is the kind of barrel that closes the gap.
It starts with 416R stainless steel, a material prized in the precision world for its heat resistance and its ability to hold accuracy over a long string of fire. The bore runs a 3-groove polygonal rifling pattern with a 1:7 twist, which stabilizes heavier .223 and 5.56 projectiles like 69, 75, and 77 grain loads without fuss. That polygonal setup also helps forgive differences in bullet shape and keeps point-of-impact shift to a minimum when you swap between ammo types.
The .223 Wylde chamber is the smart middle ground here. It's cut tighter than a 5.56 chamber for better accuracy but still safely feeds both .223 Remington and 5.56 NATO, so you're not locked into boutique ammo to get results. The SPR contour is beefy on purpose. This is not a lightweight profile, and that extra mass under the handguard is exactly what soaks up heat and keeps the barrel steady shot to shot.
The mid-length gas system pairs naturally with a 16-inch tube, giving you a softer, more consistent impulse than a carbine setup. Owners consistently mention how well-gassed these run right out of the box, along with clean feed ramp geometry and a smooth chamber. The muzzle is threaded 5/8×24, so you'll want a matching muzzle device or suppressor rather than the more common 1/2×28. It rides a standard .750 gas block journal, and the black oxide finish has a distinctive semi-gloss look that stands apart from the usual flat matte coatings. Best of all, it's backed by SOLGW's lifetime warranty, so if you somehow shoot one out, they'll take care of you.
Yes. The .223 Wylde chamber is designed to safely run both .223 Rem and 5.56 NATO. It's cut tighter than a standard 5.56 chamber for accuracy while still handling the higher pressures of 5.56, which gives you flexibility without giving up precision.
It's a 1:7 twist, which is on the faster end and ideal for stabilizing heavier projectiles. It shines with 69, 75, and 77 grain loads that precision shooters tend to favor, and it'll still handle lighter bullets just fine. The polygonal rifling also helps keep point-of-impact shift low when you switch between ammo.
The muzzle is threaded 5/8×24, not the more common AR-15 1/2×28 pattern. That means you'll want a muzzle device or suppressor mount cut for 5/8×24 threads. It rides a standard .750 gas block journal, so most low-profile gas blocks will fit.
It is a heavier contour, and that's intentional. The added mass under the handguard helps the barrel resist heat and stay consistent across a long string of fire, which is a big reason it holds tight groups. If you're building for precision or matches rather than a lightweight carry gun, that weight works in your favor.
| UPC | 644625430363 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 16Precision-SPR-223 |
| Barrel Length | 16" |
| Caliber/Gauge | .223 Wylde |
| Color | Black |
| Length | 16'' |
| Model | |
| Product Type | Barrel |
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