Champion Firearms | Rock River Arms LAR-47 Delta Carbine A4 7.62x39mm AK1291

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Rock River LAR-47 Delta Carbine 7.62x39mm

Rock River Arms LAR-47 Delta Carbine A4 7.62x39mm AK1291

Rock River Arms LAR-47 Delta Carbine 7.62x39mm (AK1291)

Retail $1,742.00

Our Price: $1,340.00

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Availability: Currently Out of Stock
Product Code: AK1291

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Description

Additional Information

Low prices on the Rock River LAR-47 Delta Carbine in 7.62X39 start at Champion Firearms-

An Engineering Marvel. Rock River Arms has been in the manufacturing business since 1996, making them relatively ancient for the AR world. Brothers Mark and Chuck Larson are the owners of the Colona, Illinois based company. Between 1981 and 1991, the two worked at Springfield Armory, where Mark was the head armorer. From there, the Larson's then went into business with Les Baer to form Les Baer Custom and specialized in manufacturing premium 1911 pistols. In 1993, the two parted ways with Baer and began building AR-15's for Eagle Arms in Coal Valley, Illinois.

At the same time, they formed their own company, which became known as Rock River Arms. In 1997, the Larson's severed ties with Eagle Arms after the company was acquired by ArmaLite. In 2003, after outperforming 10 other leading manufacturers in rifle testing trials, Rock River was awarded the DEA contract to supply the agency with 5,000 AR-15's. As a direct result of winning the contract, Rock River also began supplying the FBI and U.S. Marshals Service under piggy back contracts.

The Rock River LAR-47 is nothing short of an engineering marvel. A number of companies have tried to work through the problems associated with breeding an AR and AK rifle together, but previous results have been disappointing to say the least. Designing an AR-15 lower to accept AK-47 magazines is incredibly complicated, and Rock River had to tackle the problem from scratch. The biggest design challenges were working around the multiple variations in AK magazines and the fact that bore diameters vary for 7.62X39 ammunition (.308 vs. .310 vs. .311 diameter found across the U.S., Asia, Russia, Europe and the Middle East).

For starters, Rock River began with a redesigned billet upper and lower receiver carefully constructed to accept the wider and longer feed lips of most AK-47 magazines. The bottom of the bolt carrier also had to be tailored to accommodate the wider feed lips. Next, they solved the issue of the wide variation of hard primers found in cheap surplus by incorporating a heavier hammer spring and then modifying the bolt carrier group.

Alternatively, to deal with notoriously dirty or potentially corrosive surplus 7.62X39 ammunition, the bore and bolt carrier have been chromed. Rock River chose to maintain the standard AK-47 hook-and-latch system, so you have to insert the front of the magazine first before swinging it back into its rear locking position. The specially designed magazine well is enormous and similar to the AK-47, the bolt does not lock back when the last round is fired.

Two narrow feed ramps on the barrel extension accept cartridges from either side of the alternately feeding double stack magazine. An ambidextrous magazine release lever is easily accessible from either side of the trigger guard. The geometry of the bolt and feed ramps of the barrel extension were also adopted for the larger 7.62x39 round and its increased pressure. All of these modifications ensure optimum reliability that eluded previous attempts to chamber the AR-15 platform for 7.62X39 and then use standard AK-47 magazines to feed the rifle.

At the heart of the Rock River LAR-47 Delta Carbine design is its direct gas impingement system. Gas is tapped from the barrel as the bullet passes by the port located below the rifle's front gas block. The gas then rushes into the port and down a gas tube located above the barrel and into the upper receiver. From there, the gas tube funnels into the bolt carrier.

This gas system unlocks the bolt and begins the cycling process, but only after the bullet has exited the barrel. Direct gas impingement has several advantages over gas piston systems. First and foremost, impingement systems are usually lighter in weight. They also tend to be more accurate, less expensive to manufacture and much easier to free- float the barrel.

Unlike other AR-15 manufacturers, Rock River does not build their rifles in an assembly line process. Instead, a skilled armorer is dedicated to building just the lower assembly while another armorer is in charge of strictly building the upper. Once the lower and upper assemblies have been completed, yet another armorer is in charge of fitting them together. Every major component of the LAR-47 starts out as either bar stock or a forging.

Upper and lower receivers are made from forged and mil-spec 7075-T6 aluminum alloy that is then anodized to a surface hardness of 70 on the Rockwell scale. All components are held to extremely tight tolerances to ensure maximum accuracy. After final machining, each receiver is carefully polished to remove dings, scratches or any other minor imperfections left over from the forging and milling process.

Once polished to a perfect mirror sheen, the receivers are then bead blasted and sent out for hard coat anodizing. This polishing step is unique and the reason why minor receiver imperfections normally found in front of the magazine well on other rifles are not encountered on Rock Rivers. Smaller parts like the bolt stop, safety and trigger components are investment castings made from 8620 steel that are case hardened between 89 and 92 Rockwell.

After installation, the barrel's feed ramp is highly polished and contoured into the upper receiver, thus eliminating the common "step" between the barrel extension's feed ramp and upper receiver that are found on most AR-15 rifles. As a result, Rock River enjoys significantly improved reliability with all types of 7.62X39 ammunition. Once the rifle is fitted, the barrel is lapped and additional touches made to ensure superior workmanship, accuracy and quality.

Rock River LAR-47 Delta Carbine is equipped with a 16- inch chrome lined heavy barrel. Built by Wilson Arms, not to be confused with Wilson Combat, the Connecticut based company has been in the business of manufacturing high quality, button rifled barrels for over 60- years. Wilson makes the barrel, then flutes and cuts the chamber. Rock River hits the chamber with a finish reamer. To help reduce muzzle flash, a traditional A2 style break is affixed to the barrel.

The 2- piece quad rail forend provides attachment points for tactical accessories such as light, laser or vertical foregrip, while the ERGO SureGrip improves maneuvering and control. The LAR-47 CAR A4 includes the best production 2- stage trigger on the market and is a standard feature on most Rock River rifles.

While iron sights are not included with the package, a Picatinny flat-top receiver provides a solid platform to mount optics. Should the shooter desire, the front gas block is also equipped with a Picatinny rail for installing detachable front and rear iron sights. The 6- position Delta CAR collapsible buttstock mounts firmly to a shooter's shoulder pocket, while providing optimal length-of-pull to fit an individual shooter's dimensions.

While many other AR manufacturers insist on MPI (Magnetic Particle Inspection) and HPT (High Pressure Testing) every part to ensure that parts will not fail, Rock River disagrees. The company feels MPI and HPT fatigues parts and should only be conducted on random parts to ensure batch quality, and those tested parts should never be installed in a customer's rifle. This attention to detail on every aspect of the rifle, combined with Rock River's renown tight lower-to-upper fit, ensures a solid build every time.

While the LAR-47 will not accept AK-47 drums and early aluminum Russian magazines, the rifle takes all known steel, Bakelite and U.S. manufactured polymer (Magpul) Kalashnikov 7.62X39 magazines-- this package includes one 30- round. Weighing in at a lightweight 7.75 pounds empty and is a steady shooting platform. Due to the fact the bore is chrome-lined, the rifle does not carry an accuracy guaranty-- but is backed by the company's lifetime warranty. Overall, the LAR-47 Delta Carbine is a ingenious, .30 caliber and reliable AR-15 style rifle that is 100% built here in the U.S.A.