Precision Reflex Mk12 Mod 0 Spr Gen Ii 5.56Mm 18'' Bbl 1-8 Twist Upper FdePrecision Reflex$1,974.45
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Precision Reflex
The Precision Reflex Mk12 Mod 0 SPR Gen II upper receiver in 5.56mm brings proven designated marksman rifle ergonomics and accuracy to your build. Built on the legacy of a platform trusted for precision work, this 18-inch barreled upper with 1-7 twist rate is engineered for shooters who demand a balance of portability and long-range capability. Whether you're setting up a rifle for tactical training, competition, or field use, a quality 5.56 upper like this one gives you the foundation to shoot farther and faster than standard carbine setups.
The Mk12 Mod 0 SPR configuration has roots in military and law enforcement use, and the design translates well to civilian shooters who want a versatile mid-range platform. The 18-inch barrel length strikes a practical middle ground—short enough to handle in tight quarters, long enough to take advantage of the velocity and sight radius needed for precision work. The 1-7 twist rate stabilizes a wide range of 5.56 ammunition loads, giving you flexibility at the reloading bench or the ammo shelf.
This upper is finished in FDE (Flat Dark Earth), a durable, neutral tone that works equally well on the range, in training, or in the field. As an upper receiver assembly, you'll pair it with a compatible lower and your choice of optics, furniture, and accessories to complete your rifle. If you're building a precision 5.56 platform or upgrading an existing one, the Precision Reflex Mk12 Mod 0 SPR Gen II delivers a battle-tested design in a compact, capable package.
| Brand | Precision Reflex |
| Product Type | Upper Receiver Assembly |
| Caliber | 5.56mm NATO |
| Barrel Length | 18 inches |
| Twist Rate | 1-7 |
| Model | Mk12 Mod 0 SPR Gen II |
| Finish | FDE (Flat Dark Earth) |
This is a standard AR-pattern upper receiver, so it will mate with any mil-spec AR-15 lower receiver. Your lower should be chambered or configured for 5.56mm NATO to match this upper.
This is an upper receiver assembly. To complete your rifle, you'll need a compatible lower receiver, charging handle, bolt carrier group, and your choice of optics, grips, and furniture.
The 1-7 twist stabilizes a wide range of 5.56mm loads, from lighter 55-grain rounds to heavier 77-grain ammunition. This twist rate is flexible and forgiving for both standard and match-grade ammunition.
An 18-inch barrel balances velocity and sight radius with shorter overall length, making it suitable for precision rifle work, designated marksman applications, and shooters who want better handling than a full-length rifle without sacrificing much ballistic performance.
Precision Reflex
The Precision Reflex Mk12 Mod 0 SPR Gen II upper receiver in 5.56mm brings proven designated marksman rifle ergonomics and accuracy to your build. Built on the legacy of a platform trusted for precision work, this 18-inch barreled upper with 1-7 twist rate is engineered for shooters who demand a balance of portability and long-range capability. Whether you're setting up a rifle for tactical training, competition, or field use, a quality 5.56 upper like this one gives you the foundation to shoot farther and faster than standard carbine setups.
The Mk12 Mod 0 SPR configuration has roots in military and law enforcement use, and the design translates well to civilian shooters who want a versatile mid-range platform. The 18-inch barrel length strikes a practical middle ground—short enough to handle in tight quarters, long enough to take advantage of the velocity and sight radius needed for precision work. The 1-7 twist rate stabilizes a wide range of 5.56 ammunition loads, giving you flexibility at the reloading bench or the ammo shelf.
This upper is finished in FDE (Flat Dark Earth), a durable, neutral tone that works equally well on the range, in training, or in the field. As an upper receiver assembly, you'll pair it with a compatible lower and your choice of optics, furniture, and accessories to complete your rifle. If you're building a precision 5.56 platform or upgrading an existing one, the Precision Reflex Mk12 Mod 0 SPR Gen II delivers a battle-tested design in a compact, capable package.
| Brand | Precision Reflex |
| Product Type | Upper Receiver Assembly |
| Caliber | 5.56mm NATO |
| Barrel Length | 18 inches |
| Twist Rate | 1-7 |
| Model | Mk12 Mod 0 SPR Gen II |
| Finish | FDE (Flat Dark Earth) |
This is a standard AR-pattern upper receiver, so it will mate with any mil-spec AR-15 lower receiver. Your lower should be chambered or configured for 5.56mm NATO to match this upper.
This is an upper receiver assembly. To complete your rifle, you'll need a compatible lower receiver, charging handle, bolt carrier group, and your choice of optics, grips, and furniture.
The 1-7 twist stabilizes a wide range of 5.56mm loads, from lighter 55-grain rounds to heavier 77-grain ammunition. This twist rate is flexible and forgiving for both standard and match-grade ammunition.
An 18-inch barrel balances velocity and sight radius with shorter overall length, making it suitable for precision rifle work, designated marksman applications, and shooters who want better handling than a full-length rifle without sacrificing much ballistic performance.