{"product_id":"bcm-standard-12-5-carbine-complete-upper-receiver-group-w-mcmr-10-handguard","title":"BCM Standard 12.5\"\" Carbine Complete Upper Receiver Group w\/ MCMR-10 Handguard","description":"\u003ch2\u003eBravo Company USA BCM Standard 12.5\"\" Carbine Complete Upper Receiver Group w\/ MCMR-10 Handguard\u003c\/h2\u003e\n\u003cbr\u003eIn developing the USGI M4 carbine as one of the primary weapons for today's infantry, some modifications were performed to the original M16 platform to enhance the reliability of the shorter barreled carbines. With the shorter carbine gas system and the increased gas port pressure, the carbine cycled faster, and at times the cycle rate could be faster than the magazine would feed ammunition. One of the modifications done to increase reliable feeding included enhancing the angle and the length of the feed ramps. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. This feature is offered on all BCM upper receivers and all BCM barrels.\n\u003cbr\u003e\u003cbr\u003eIncludes 3\"\" Picatinny rail section and BCM MCMR sling mount   Manufactured by Bravo Company MFG Inc   Professional-grade design with Mil-Spec features for duty use   Fully assembled headspaced and test-fired before shipping   Barrel components parkerized separately prior to assembly   Test-fired and laser bore-sighted to Mil-Spec standards   Enhanced M4 feed ramps for reliable feeding   Factory-machined and hard-coat anodized feed ramps   USGI laser-etched T-marks for accessory remounting   USGI 1\/7 twist rate ideal for heavier 5.56 ammo   Mil-Spec barrel steel MIL-B-11595E CMV for durability   Chrome-lined bore and chamber for enhanced reliability   Manganese phosphate finish for corrosion resistance   5.56 NATO chamber for compatibility with high-pressure ammo   High-Pressure Tested (HPT) and Magnetic Particle Inspected (MPI)\n\u003cbr\u003e\u003cbr\u003eMPN: BCM-URG-12-MCMR10\n\u003cbr\u003eUPC: ","brand":"Bravo Company USA","offers":[{"title":"Default Title","offer_id":52689141727517,"sku":"BCM-URG-12-MCMR10","price":725.35,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0859\/4083\/0493\/files\/BCM-URG-12-MCMR10.png?v=1786087158","url":"https:\/\/americanpolicesupply.com\/products\/bcm-standard-12-5-carbine-complete-upper-receiver-group-w-mcmr-10-handguard","provider":"American Police Supply","version":"1.0","type":"link"}