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The Buck Mark URX's barrel is 0.89 in diameter top to bottom and 0.76 inch in diameter side to side (it has flat sides), and the muzzle is recessed and precision crowned.
Browning Buck Mark Contour URX Browning's Buck Mark .22 has been around since the mid-1980s, and since then it has undergone a number of minor changes.
It features a number of familiar features found on the ECC, such as the Pressure Reduction System, Ball Mill Lightened Barrel, Carbon Cutter Bolt Carrier, Ambidextrous Controls, 4.5-pound two-stage match trigger, 14.5-inch URX 3.1 rail system, SOPMOD buttstock and the MAMS Muzzle Brake.
Army M1.10s are equipped with a Leupold Mk 4 3.5-10 x 40 mm scope mounted on the Upper Receiver Extending (URX) fore end (which features an integral folding front sight), to achieve an under-one-MOA accuracy at a range of over 800 metres.
Its contoured heavy barrel sits atop an alloy frame with rubber URX grip panels that provide a nonslip grip.
The new Buck Mark Practical URX semiauto pistol has a matte gray alloy finish receiver, tapered bull 5 1/2" barrel and Browning's Ultragrip RX ambidextrous rubber grips.
The first landmark products to originate at KAC came during the 1984 to 1989 time frame with the introduction of the 9mm snap-on sound suppressor, the first "LEGO kits," which included the forerunner of the RIS/RAS and URX rail systems, and with input from Eugene Stoner, the development of the All American 2000 pistol (sold to Colt) and the SR-25 precision rifle platform.