The Rock River Arms AR-15 OSH-1T 18 HBAR 416R rifle in .223 Rem/5.56 NATO caliber is a developed model based on the AR-15 platform, designed for sport shooters and users requiring high precision and reliability at medium and long range. Based on the AR-15 platform, this model offers a number of modern technological and design solutions that enhance its functionality and comfort.
The 16" long barrel with a 1:8" thread pitch is made of stainless steel for Rock River Arms by Willson Arms, which ensures its long life and corrosion resistance. The carbine features a universal thread pitch that allows the use of both light and heavy bullets. Carefully selected length and profile of the barrel guarantee optimum rigidity and high discharge rate.
Features of the Rock River Arms AR-15 OSH-1T 18 HBAR 416R carbine:
- Caliber: .223 REM/5.56 NATO (223 Wylde match chamber).
- Barrel: 18 inch stainless steel barrel made for Rock River Arms by Willson Arms, 1:8 thread pitch, .750'' diameter under gas block, cryogenically tempered
- Breech chamber: forged A4 of 7075 T6 aluminum with tappet
- Trigger chamber: forged from 7075-T6 aluminum, Rock River Arms LAR-15M
- Breechassembly: slide - chemically hardened, 8620 steel, chrome-plated high-carbon steel lock 158
- Discharge device: ½ x 28 thread, RRA OPERATOR MUZZLE BRAKE with recoil compensating elements
- Reloading lever: double-sided Radian Raptor
- Lock/magazine drop: single-sided, right-hand magazine drop
- Trigger: double-action Rock River Arms varmint, very sensitive - ideally suited for target shooting
- Bed: lightweight, floating 17" long with reduced weight, compatible with M-LOK system, anodized
- Mode of operation: gas system, carbine length gas tube, low profile gas block
- Fire selector: double-sided version
- Flask: Magpul PRS Lite, a lightweight design with an adjustable tank for both pillow and dynamic shooting positions - perfect for medium and long range shooting
- Buffer: made of 6061 aluminum
- Weight: 3.4 kg without magazine
The Rock River Arms AR-15 OSH-1T 18 HBAR 416R has a Free Float aluminum bed, which minimizes the barrel's contact with other carbine components, which improves shooting precision. The bed is equipped with numerous M-LOK slots, allowing the installation of additional equipment such as sights, flashlights or a foregrip. The ergonomic pistol grip and adjustable flask ensure comfort even during prolonged shooting.
Rock River Arms AR-15 OSH-1T carbine designed for individual personalization
The carbine is not equipped with factory sights, allowing the user to fully personalize it to their own preferences. The top Picatinny rail allows mounting of a variety of optical and collimator sights, which increases the versatility and adaptability of the weapon.
The carbine is equipped with a multifaceted adjustable Magpul PRS Lite precision shooting flask. The PRS Lite is based on the user-appreciated PRS GEN3 flask and is lighter by nearly 300 grams, so it does not significantly increase the weight of the weapon, while still allowing for precise adjustment.
The Rock River Arms AR-15 OSH-1T 18 HBAR 416R is equipped with standard AR-15 platform safety features, including a manual safety and a loading indicator. The carbine's operating system, based on a short-stroke piston gas mechanism, ensures reliable operation even in harsh conditions.
