LMCR-1
Weapon Name- LMCR-1, "Lambda Main Combat Rifle" 1
Round Type- 6.5mm Grendel
Over-all length- 36.9 to 33 in (94 to 84 cm) w/ adjustable stock, 35 in (838 mm) (stock extended) 31.75 in (756 mm) (stock retracted) with M4 Stock
Barrel length- 16.5 Inches
Weight- 7.9 lb (unloaded)
Rate of Fire- 560 to 640 rpm
Feed Mechanism- Detachable Box Magazine
Round Capacity- 26 Standard, 30 for extended, capable of using Beta-C magazine
Effective Range- 600 meters
Range- 1090 meters (1200 yards is still super sonic, or generates over 450.84 joules, required to remain stable in flight and make a kill)
Accuracy- 1 MOA
Accessories- Picanty Rail
Quick switch firing mechanism- N/A
Scope/Sights- Picanty Rails
Muzzle Velocity- 820 m/s, with 120 gr (7.8 g) Norma FMJBT
Firing System- Short Stroke Gas Piston, Rotating Bolt
Miscellaneous/electronic information- Essentially an HK416 Refitted to use 6.5mm Grendel Rounds.
Basic Information
The weapon is essentially an HK416 M27 IAR platform modified to use 6.5mm grendel rounds. The weapon accepts STANAG magazines, although is generally self limited to using high reliability HK magazines, Magpul magazines, or sure fire magazines. The weapon is designed to accept both 26 and 30 round magazines as it's standard magazine capacity, with 26 being the most typical (the amount capable of fitting into a 30 round 5.56mm magazine).
The weapon uses a heavy, hammer forged, polygonal 16.5 inch barrel with a 6 groove one in 1 : 8.75 inch (222.5mm) right hand twist. Because of the polygonal barrel, the weapon achieves a higher velocity than it ordinary would with a shorter, similarly rifled barrel, and also extends the weapons barrel life. Coupled with the heavy barrel profile and the hammer forged chrome plated stainless steel barrel composition, the life of the barrel is greatly extended beyond most ordinary rifles. General barrel lives of 20,000 rounds are not uncommon.
The weapon is of exceptionally high quality, the frame being made predominately out of steel and high strength composites and polymers. The weapon features ambidextrous controls and international fire indicators, along with picanty rails and a forward assist. The weapon also features an integrated 6 point collapsible stock, while the shoulder pad can be either convex or concave and the stock features a storage space for maintenance accessories, spare electrical batteries or other small kit items. It is possible to replace this stock with any variant of M4/AR-15 styled stock available.
In July 2007, the US Army announced a limited competition between the M4 carbine, FN SCAR, HK416, XCR, and the previously-shelved HK XM8. Ten examples of each of the four competitors were involved. Each weapon fired 60,000 rounds in an "extreme dust environment." The purpose of the shoot-off was for assessing future needs, not to select a replacement for the M4. The XM8 scored the best, with only 127 stoppages in 60,000 total rounds, the FN SCAR Light had 226 stoppages, while the HK416 had 233 stoppages. The M4 carbine scored "significantly worse" than the rest of the field with 882 stoppages. The HK416 experienced roughly the equivalent of 1 jam every 257 rounds fired, while the M4 experienced 1 jam every 68 rounds fired, making the Hk416 roughly 3.8 times more reliable in typical field conditions than the M4 Carbine. The cold hammer-forging process provides a stronger barrel for greater safety in case of an obstructed bore or for extended firing sessions. This includes "OTB" (Over-the-beach) capability; the HK416 can be safely fired after being submerged in water and not completely drained.
The HK416 uses a proprietary gas system derived from the HK G36, replacing the direct impingement gas system used by the standard M16/M4. The HK system uses a short-stroke piston driving an operating rod to force the bolt carrier to the rear. This design prevents combustion gases from entering the weapon’s interior, a shortcoming with direct impingement systems. The reduction in heat and fouling of the bolt carrier group increases the reliability of the weapon and extends the interval between stoppages. It also reduces operator cleaning time and stress on critical components. The SA80 bull-pup assault rifle used this system long before the HK G36 was developed. According to H&K "experience that Heckler & Koch gained during its highly successful 'midlife improvement programme' for the British Army SA80 assault rifle, have now borne fruit in the HK416.".
The HK416 is equipped with a proprietary accessory rail forearm with MIL-STD-1913 rails on all four sides. This allows most current accessories, used on M4/M16-type weapons, to be fitted to the HK416. The HK416 rail forearm can be installed and removed without tools by using the bolt locking lug as the screwdriver. The rail forearm is 'free-floating' and does not contact the barrel, improving accuracy.
The weapon capable of using sure-fire quad magazines, although this is generally limited to 50-52 round quad magazines, rather than the 60 round 5.56mm round magazines.
The weapon is generally combined in use with the FN Herstal Black Box round counter and a liquid crystal display unit, and a surefire muzzle break, designed to be fit to 6.5mm grendel barrels. The round counter can also be attached to the "land warrior" system, in such that the round counter will display it's information on the HUD of the land warrior system.
