LMT's MRP quick change barrel system is one of the more valuable and convenient inventions for AR type rifles. This allows the system to be extremely compact and concealable as well as giving the operator the option of having multiple barrels for multiple functions. For most all retro builds these are great barrels even if they come with a While the MRP is interesting, the most interesting aspect of the system is the quick-change barrel feature. The LMT MRP has a quad-rail system that utilizes the Mil-Std 1913 rail in two different lengths, one standard rifle length and the other for Close Quarters Battle (CQB). If you already own one of LMT's AR-15 rifles you can quickly and easily change your 5.56, or other caliber rifle into a 224 Valkyrie DMR. Bolt and gas system are perfection. The MRP upper receiver has a quick-change barrel system that allows the operator to change the caliber or the barrel length of the weapon in one minute. Its also considerably cheaper than the SR25 and JP. Intermittent threading provides multiple points of interface. These are spare, quick change barrels for LMT's MRP/CQB chambered in 556 Note: Items marked as Special Order are ordered from the manufacturer. The 224 Valkyrie is one of the best long range precision cartridges … It features an interlocking trunnion and lock ring that hold the barrel in place proximate the receiver. The present invention is an improved quick change barrel system for a firearm. MilitaryMorons.com (a very cool and informative site, by the way) has some… good information on the LMT MRP/QCBS on this page. All of LMT’s barrels are button cut and cryogenically treated for stress relieving. Both LMT & LWRC have bolt carrier's that help eliminate carrier tilt and both have a self regulating gas system. Another unique feature in the Lewis Machine & Tool CQB Starter Kit are the MRP quick-change barrel set-up, and the kits can be had in three different barrel configurations, two 16-inch options and one 10.5-inch model. Everything about the LMT MWS is top shelf: 100% reliable, ambidextrous, outstanding accuracy, 1200 yard capacity, adaptable, and convertible. The MGI® Quick Change Barrel Upper Receiver (QCB-D) is completely compatible with your M16 (small front pin) lower receiver and allows the user to change barrels in just seconds. LEWIS MACHINE & TOOL - AR-15 CQB UPPER RECEIVERS 5.56 PICATINNY. MilitaryMorons.com is an excellent source of info on tactical weaponry and equipment/gear. Having shot them all, the LMT gives up little to the JP in the accuracy department when using a comparable barrel. A foldable handle is provided to allow safe removal of the lock ring and additional torque for attachment and removal of the lock ring from the system. Buy LMT Lewis Machine & Tool MARS-L DMR, quick change barrel, new in box, ambi: GunBroker is the largest seller of Semi Auto Rifles Rifles Guns & Firearms All: 892032810 The only tool needed is a standard T-30 Torx bit to tighten the bolts. AND you get quick change, inexpensive barrels. Your Price: $429.00 Out of Stock. Nothing touches a SR15 when you factor in quality, reliability, features, durability and value. The two I like best are LWRC & LMT (CQB MRP) I have always liked the LMT MRP system's quick change barrel system, but I'v also always wondered just how rugged it is. Modular Weapon System (MWS) is absolutely correct; change your mission, change the stock, change the barrel length, change the caliber. The MLC Pistol 556 comes standard with an 11.5-inch chrome lined, chromoly barrel with a 1:7 barrel twist. It’s a monolithic, one piece upper that facilitates a quick barrel change feature. Being a manufacturer direct dealer, we are dependent on their warehouse inventory and production schedule. Now they have it in a piston version, makes it even nicer. This barrel kit includes everything you will need to caliber swap. Made in the U.S.A.