Since the development of 6.8mm SPC ammunition, such caliber weapons have been listed on the American civilian market one after another, among which P4 15 6.8mm short-barreled rifle introduced by POF-USA is unique in material handling.
About POF- American company.
Patriot Ordnance Factory (POF) is a small American company whose production and R&D headquarters are located in glenda, Arizona. The company is good at producing AR-style guns, upper and lower shells and other accessories. Frank Disoma, the president of the company, is a leader with 28 years' experience and recognized as the most experienced and talented person in the industry.
The most representative products of POF company are the piston-operated AR rifle and corrosion-resistant operating system (CROS) independently developed by POF company, and the CROS system is applied to all products of the company. CROS, that is, NP3 coating treatment technology, is a coating technology that combines nickel alloy with PTFE polyester material. In this technology, nickel can be combined with equipment at the fastest speed without electroplating or catalytic treatment. Coated parts can not only prevent chemical corrosion, but also improve hardness and strength.
POF-USA widely uses NP3 coating treatment technology on all parts of P4 15 rifle, which makes the whole rifle have excellent corrosion resistance.
Advantages of 6.8mm bullets: The controversy about 5.56mm and 6.8mm caliber bullets once became a hot spot in the weapons industry. "Which is more powerful? Which is better? " Industry insiders and gun experts have their own opinions. Although the ballistic performance and penetration performance of 6.8 mm SPC bullets are not outstanding when the distance exceeds 400 yards (365.8 meters), it is an acknowledged fact that the power of 6.8 mm SPC bullets is higher than that of 5.56 mm bullets at close range, which is also one of the selling points of 6.8 mm caliber weapons.
Although 6.8mm SPC bombs have not been installed by the military, 6.8mm caliber weapons have mushroomed in the civilian market. POF-USA gives full play to the advantages of 6.8mm SPC ammunition, and uses its experience in producing AR rifles to launch P4 15 6.8mm short-tube melee rifles, which brings new vitality to the military, police and civilian markets.
P4 15 6.8mm short barrel rifle is short in body, good in maneuverability and powerful in 6.8mm SPC bullet, so it is an effective melee weapon. All parts of the gun have been specially treated by POF company, which is a model of corrosion resistance.
Barrel: The barrel of p 4 15 6.8 mm rifle is made by Rock Creek Barrels, Inc., and is made of 4 150 chrome-aluminum alloy, which is usually used to produce machine gun barrels. Because the repeatedly fired machine guns require high heat resistance and corrosion resistance of barrel materials, the Rockwell hardness of the barrel made of this material after nitrate treatment is as high as 70, which is twice that of the military standard barrel, and the corrosion resistance of the barrel is 10 times that of the military standard chrome-plated barrel.
There are four right-handed rifles in the barrel, and the loading distance is 287 mm The civilian version of the muzzle device is an eddy current flame arrester produced by POF company, and the head of the flame arrester is provided with a toothed protrusion, which can be used as an attack weapon to break the window.
The military version can also be equipped with birdcage flame arresters of M 16A2 rifles. The barrel is also traditionally machined with longitudinal grooves, which reduces the weight and increases the heat dissipation area of the barrel.
Air guide device
P4 15 6.8mm short-tube rifle adopts piston air guide mode and bolt rotary locking system. The gas regulator has two positions, namely normal (N) and closed (S). The air guide device and other components are treated with anti-corrosion. The chromium alloy piston and gun rack are also NP3 coated, and even the wire drawing handle is NP3 coated.
Hand guard and case: P4 15 adopts ERGO trapezoidal winding hand guard of Falcon Industry Company, which can be equipped with tripod and belt ring. Combined with the hand guard, the patented hunting/sniper/tactical MRR (modular rail receiver) has a modular shell with guide rails.
The upper shell is made of 7075-T6 aviation aluminum alloy, and the surface is protected by NP3 coating and anodized. The unique CeraKote ceramic coating treatment can greatly improve the high temperature resistance and wear resistance of the parts. CeraKote ceramic coating technology is widely used in high temperature and high wear parts, such as firearms, exhaust devices, pistons and turbines.
Bolts and bolt holders
The gun rack is made of steel, and is also coated with NP3. The gas guide ring and piston treated by NP3 also have high corrosion resistance.
Lower shell: The lower shell of P4 15 is integrated with the trigger holder, and it is made of a whole piece of 7075 T-6 aviation aluminum, which is also a major feature of P4 15 or POF company, because the trigger holder of the lower shell of AR rifle is mostly assembled as a separate part. The lower shell is also treated by NP3 coating, black anode electroplating and ceramic film covering.
On P4 15, there is another part that is not common in other AR rifles, that is, the trigger/hammer anti-moving pin part produced by KNS Company. The trigger force of P4 15 is 20.4N, of which the civilian version is the fire match trigger component. In addition, P4 15 manual safety, magazine and empty bin hook release buttons are arranged on both sides, which is convenient for left and right hands to operate.
Its head can adopt Victor's six-speed adjustable EMOD telescopic head or MAGAPTR head.
Other accessories
P4 15 has several options, namely FTA-2005 mechanical sight produced by POF company, BUIS folding mechanical sight produced by Troy company and folding mechanical sight produced by Diamond Head company. The magazine can be PMAG magazine of Magap Company or C-Products Company. It is worth noting that all the accessories on P4 15 short barrel rifle are made in the United States.
Informal shooting tests work well.
The test adopts about 23m(25 yards) supporting shooting mode, using Trojan BUIS mechanical sight. Out of curiosity, at the beginning, the tester tied an ancient German coin to the splint at a distance of about 30.5m, using a 6.8mm tap from Hornaday Company. V-MAX, warhead mass 7. 13g. Although the distance of 30.5m is very close, it is still difficult to aim at a coin-sized target with a mechanical sight at this distance.
In the actual test, the first shot hit the coin Later, V-MAX of Hornaday Company and BTHP with warhead mass of 7. 13g were used to make a projectile dispersion circle with a diameter of only 19mm at a distance of 23m. It should be noted that this is only an informal test. If you use the ACOG optical sight, your performance at this distance can be improved.
KNS trigger/hammer anti-rotation pin assembly: The function of the trigger/hammer anti-rotation pin assembly is to lock the position of the fixed pin on the basis of fixing the trigger and hammer, and prevent the fixed pin from falling off or rotating, thus ensuring the reliability of firearms when shooting and carrying. Because once the trigger/hammer fixing pin falls off and moves, it will lose the bearing point or the deviation of the bearing point, which will directly lead to the gun being unable to shoot or increase the wear of the internal parts of the gun.
The loss and displacement of the fixed pin are usually caused by improper assembly of the gun, the impact of external force, the linkage between the trigger and the hammer when rotating, and the gradual loosening of the fixed pin after repeated rotation for a long time. The trigger/hammer anti-rotation pin assembly is simple in structure and generally consists of four parts: anti-rotation pin, anti-rotation pin locking piece, fixing screw and installation tool.
The trigger/hammer anti-moving pin components sold in the American market are mainly produced by KNS, DPMS, JP and other companies, and KNS products are undoubtedly the best in the industry. The trigger/hammer anti-moving pin assembly of KNS company is divided into two generations, in which the anti-moving lock piece of the first generation product is similar to dumbbell shape, slender in the middle and round on both sides, which is dubbed as "dog bone" by some people abroad; The anti-lock pads of the second generation products are simple semi-cylinders and are widely used.
When installing, open the case, loosen the hammer, push out the hammer fixing pin on the gun with a punch (bullet-shaped), and then insert the hammer anti-moving pin of KNS. Take out the trigger fixing pin and install the trigger anti-rotation pin in the same way. Then, combine one end of the anti-movement locking piece with the hammer anti-movement pin, align one end of the opening with the trigger anti-movement pin, and then install the fastening screw. After installation, press the hammer and pull the trigger to check its operation. If there is no problem, you can install the upper casing, and the whole installation process is over.