Geissele
Geissele factory Mk18 URGI CQBR near clone Upper Receiver Group 10.3"
MSRP:
$1,249.00 - $1,450.00
$1,149.00 - $1,430.00
Unleash the Power of the Mk18 Mod 3 11.5" Colt - Geissele CQBR URGi Upper Receiver Group
Experience the pinnacle of close quarter battle rifles with the Mk18 Mod 3 11.5" Colt - Geissele CQBR URGi Upper Receiver Group. Crafted to the highest military standards, this custom-built masterpiece will revolutionize your shooting performance. With its cutting-edge features and exceptional reliability, the Mk18 Mod 3 is the new gold standard in the world of firearms.
At the heart of this top-tier upper receiver group is the renowned 11.5" Colt chrome-lined phosphated military spec barrel. Built to deliver unrivaled accuracy and durability, this barrel ensures consistent performance in any situation. Combined with the 10.5" Geissele Mk16 rail, the Mk18 Mod 3 offers enhanced stability, allowing for precise target acquisition and effortless maneuverability.
The Mk18 Mod 3 is built to accommodate a wide range of accessories and attachments, ensuring versatility and adaptability to suit your specific needs. With the Geissele Mk16 upper rail, you have ample space to mount your preferred optics, lights, and lasers, giving you the edge in any tactical scenario. The upper receiver group accepts Surefire SOCOM series suppressors, allowing for whisper-quiet operations without compromising performance.
Geissele, a name synonymous with excellence in the firearms industry, has once again delivered an outstanding upper receiver group. The Mk16 upper rail, proven in the hands of USASOC with the M4A1 in a 14.5" barrel, takes center stage in the Mk18 Mod 3. Built with meticulous attention to detail and manufactured to stringent military standards, the Mk16 ensures unparalleled performance and reliability in the most demanding environments.
Choose between Colt and Daniel Defense barrels, both renowned for their exceptional quality and reliability. These military-grade barrels, crafted from chrome-moly steel alloy, feature a chrome-lined interior for enhanced longevity and corrosion resistance. Whether you opt for the Colt or Daniel Defense barrel, you can rest assured knowing that you are equipped with a top-of-the-line component that meets and exceeds military specifications.
With the Mk18 Mod 3, you have the freedom to customize your shooting experience with a range of Surefire muzzle devices. From the lightning-fast 4-prong Fast Attach Flash Hider to the versatile SOCOM 3-prong and SOCOM 4-prong options, each device is expertly timed and secured with Rocksett. Experience superior muzzle control and reduced recoil, ensuring faster follow-up shots and improved overall shooting performance.
The Mk18 Mod 3 sets the standard for reliability with its carefully selected components. Equipped with the PRI M84 military Gas Buster charging handle, this upper receiver group prevents gas blow-back, especially when operating in suppressed mode. The low-profile long nose gas block from Sadlak, expertly installed and secured, ensures consistent gas flow for optimal performance. For those seeking the utmost in refinement, the Geissele blackened gas block option, complete with barrel pinning, is available upon request.
The Colt upper receiver, paired with a Colt bolt carrier group, guarantees flawless operation and exceptional durability. Constructed from military-grade materials and featuring rigorous testing procedures,
the Colt upper receiver and bolt carrier group are engineered to withstand the harshest conditions and deliver unparalleled reliability. With Brass Aluminum Company forgings and precise craftsmanship, Colt ensures that each component meets the highest standards of quality and performance.
The Mk18 Mod 3 upper receiver is designed to fit any mil-spec lower receiver, offering seamless compatibility with a wide range of options. While Colt lower receivers are recommended for the ultimate pairing, other military-grade forged lower receivers from reputable manufacturers such as LMT, KAC, and FN can also be used. This flexibility allows you to personalize your firearm while maintaining the exceptional performance of this military-grade upper receiver group.
Unlock the true potential of your Mk18 Mod 3 with the recommended ammunition options. While this exceptional upper receiver group accepts all common ammunition, we recommend utilizing 55, 62, or 77 grain military-grade ammo to achieve optimal performance. Experience the reliability and accuracy that this precision-engineered system is capable of, giving you the confidence to dominate any shooting scenario.
Note: the forged upper receiver will fit any mil-spec lower receiver. Colt is recommended, but other military grade forged lower receivers will fit as well, e.g., LMT, KAC, FN. Commercial forged and billet receivers will fit, but are not recommended with this military grade upper receiver group.
NFA notice: This upper when assembled to a rifle lower and stock becomes a short barreled rifle (SBR) which is subject to registration under the National Firearms Act. If assembled to a lawful AR pistol lower without a stock, this item can be used as part of an AR pistol. Be sure you understand the laws concerning SBRs and AR Pistols.
pics courtesy of Potomac Armory, Geissele and u/GS556 from Reddit
Details
| Upper Receiver |
Colt M4 military grade forged upper receiver, 7075 aluminum hard coat anodized with M4 feedramps and engraved and painted top T marks. |
| Barrel |
Either Colt or Daniel Defense 11.5" military grade barrel: 1:7 twist, "chrome-moly" Steel alloy barrel, phosphated exterior and chrome-lined. HP/MPI. 5.56 NATO chambered and 1/2" threaded with 28 thread pitch. Colt barrels are new, but could be take-offs from other new rifles, and may have grooves from where a front sight base was installed. Any grooves will have been blackened and covered by the long nose low profile gas block. Colt barrels generally are CAGE code marked near the muzzle. Daniel Defense barrels will be stamped between the breach and gas bock, and might not be visible without removing the rail. Choice of barrel is determined availability. IF YOU HAVE A PREFERENCE, you can note that in the comments at check-out. If you tell us it is a preference, we will try to accomodate, but if not, continue with what is available. If you tell us it is A REQUIREMENT, then we will cancel your order and fully refund if that selection is not available. |
| Bolt Carrier Group |
Colt military grade High Pressure tested and Magnetic Particle Inspected carrier and bolt. Military grade staked gas port. Test fired for tested. Bolt is normally marked MPC. The actual bolt may be marked with a "C" or might not be, depending upon what Colt is sending when your upper is assembled.
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| Upper Rail / Hand Guard |
Geissele Mk16 10.5" military grade upper receiver, roll marked "Geissele Automatics" Hard coat anodized in DDC with T-marks engraved and not painted, as per military spec in the URGi.
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| Muzzle Device |
Standard with no flash hider, options for Surefire 4-prong Fast Attach Flash Hider (215-A), Surefire SOCOM 3-prong or Surefire SOCOM Close Time Surefire SOCOM 4-prong or Surefire SOCOM Warcomp 3-prong expertly timed and secured with Rocksett. Note: we time the Warcomp in Neutral position. If you prefer the partially offset gas port, just let us know i the comments. Note: 1) The Warcomp could be a bit much for an 11.5", as significant blast will project through the ports. Not well suited for indoor ranges, as you will make a lot of noise for your neighbor, but the Warcomp is still very popular. 2) There are two different 4-Prong flash hiders. The Fast Attach 215-A s a very attractive option, but is not compatible with current production SOCOM suppressors. The other is a SOCOM compatible flash hider, but considerably more expensive.
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| Gas Block |
Standard is a Colt low profile factory installed and pinned gas block. This is like an A-frame front sight base, but with the top removed, and two taper pins hold this in place. Also available at no additional cost is the Sadlak extended gas block, steel constructed and phosphated coated and set in place with two set screws and the barrel dimpled to lock the set screws in place. This is a good option, as the longer nose gas block will cover the front taper pin groove, from where the FSB was removed. A Mk12 gas block is available as an option without additional fee. Like the Sadlak extended gas block, the Mk12 gas block is set in place with bottom set screws and red Loctite, just like the US Navy SEALS used for two decades. The Mk12 gas block is the most "military clone correct" of all the options. Also, you may upgrade (for an additional cost) a Geissele Super Duty Gas Block, black oxide or nitride blackened, and set in place with lower set screws and an additional drilling of a pin through the barrel.
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| Charging Handle |
PRI gas buster charging handle, M84 with military latch. You may also upgrade to a Geissele Black Military Airborne charging handle, for an additional cost. Contact our sales team for more information.
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| Country of Origin |
Made in USA with all component parts military grade made in USA
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| Caliber |
5.56mm / .223 caliber
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| Recommended Ammo |
Accepts all common ammunition. 55, 62 or 77 grain military ammo recommended, but the 11.5" barrel is very tolerant of different ammo
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Geissele
Potomac Armory
Potomac Armory
Colt
LMT Defense
