Panzer AR57 12in Ultra Light Tactical Complete Upper Assembly

<p><span style="color: rgb(26, 26, 26);">Manufactured in the USA by AR57, LLC. - AR57 ULT (Ultra Light Tactical) Complete Upper Assembly&nbsp;</span></p><p><br></p><p>Factory New - comes with a 12" lightweight barrel with M-LOK rails.&nbsp;&nbsp;This AR57 Upper Receiver Assembly converts any AR-15 lower to a rifle capable of shooting 5.7x28 ammunition. The unique upper design loads from the top and ejects downward through the AR-15 mag well. The new generation upper has a stronger, lighter, and more streamlined rail; finished with a beautiful ultra-smooth melonite black coating and comes with one 50-round magazine.&nbsp;</p><p>Convert your AR-15 type pistol to shoot the same 5.7x28 ammo as the legendary FN P-90 PDW!</p><p>This AR57 Upper is constructed with a steel barrel, muzzle brake, bolt carrier group, buffer, and screws, all built into an alloy monobloc receiver. In other words, it is ready to drop in and push pin.&nbsp;It is also built as solid as a tank. A single block of Aircraft Grade 7075 T6 aluminum, referred to as Kryptonite Monobloc and rated at 83000 PSI strength, is used for the&nbsp;receiver and its component rails. Precision milled to within .002 tolerance, this upper is chambered in 5.7 x 28 mm. The barrel is 12 inches and the bore is six groove right hand 1:8.5 FN twist.</p><p>The sight system is a 13 slot Picatinny over the operating handle, with 3-slot upper and lower forward rails. The metal parts, including receiver, rail, barrel, and bolt, are melanite treated for a hard, durable finish. Bolt is made from 8620 alloy. The receiver&nbsp;and rail block measures just over 17 inches overall length; from the receiver back to the muzzle end, the total length is 24 9/16 inches. In contrast to many other receivers, there is no gas system to become clogged with carbon or fouling; the chamber stays clean well beyond extended shooting. Extremely reliable, simplicity is key, with the free sliding bolt being the only moving element and its easy removal makes maintenance literally a snap. The AR-57 system ejects spent rounds through the lower’s magazine well.</p>

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