Upper Rock River Arms for the AR-15 is a breech kit complete with breech chamber and barrel, a great choice for those who want the highest quality and high performance. Created with dynamic shooters in mind, it provides a perfect fit for the AR-15 platform, delivering the reliability you need in any situation. Its solid construction, reliable DI lock and precision barrel make it ideal for professionals and shooting enthusiasts.With a barrel length of 10.5" (26.67 cm)this set offers maneuverability and speed, performing perfectly at close range. The barrel is adapted to the popular .223 Remington / 5.56 x 45 mm caliber .
Features of the Rock River Arms locking chamber assembly for the AR-15:
- Wide range of compatible accessories available on the market.
- Self-supporting front bed equipped with M-LOK standard mounting holes.
- Self-supporting and unattached to the bed with a 10.5" long barrel.
- Operating principle based on a rotating lock with direct injection of powder gases into the slide.
- Chrome-plated high-carbon steel 158 lock.
- Low-profile gas block, facilitating the attachment of a narrow bed
- Full-length chamber mounting rail in 22mm Picantinny standard
Compatible with military standard
Compatibility with the Mil-Spec standard and a front bed fitted with an M-LOK mount and a 22 mm Picantinny rail give a wide range of possibilities for modifying the weapon according to personal preferences.
The operating principle of the Rock River Arms Upper for AR-15 7"
Upper is based on the classic gas system developed by ArmaLite. It uses gunpowder gases that, through a hole in the barrel and then a gas tube, enter the slide, pushing it apart and unclamping it. The advantage of such a system is the reduced weight of the moving assembly, reduced recoil sensation and smooth operation of the breech. The weapon is bolted by rotating the breech with 6 symmetrical bolts. The 8620 steel slide has been hardened by a chemical process. The lock itself is made of 158 high-carbon steel.
The barrel in the Rock River Arms upper for the AR-15 7"
The breech chamber is equipped with a thin-walled barrel with a length of 10.5" and a thread pitch of 1:7. Its surface has been chrome plated to protect it from the corrosive effects of powder gases and water. It is finished with a ½ x 28 thread with A2 flame suppressor. The openwork front bed with angles at 3, 6 and 9 o'clock has M-LOK standard holes. With their help, you can easily install additional accessories like a flashlight, foregrip, angle grip or additional sighting device. At the front and rear of the bed two short sections of 22mm rail were applied for sighting instruments.
