Can somebody help me to know what is this?
Not sure the name but that is the new battle rifle the US army was testing to replace the M-16. The top half is a 40mm launcher while the lower half is 5.56mm
The F2000 rifle is a gas operated, rotating bolt, select-fire weapon. F2000 features polymer stock with bull-pup layout. The stock has built-in standart rails on the top of the weapon (for different sights and scopes etc) and mounting point ahead of triggerguard, where additional modules may be installed (such as grenade launchers, non-lethal modules etc). In the basic configuration, the upper rails mounts 1.6X magnification optical sights, and the lower mounting point is covered by removable handguard. The unique feature of the F2000 rifle is its' patented front ejection systems: the spent cases, extracted from the chamber, travel from the rear part of the gun to the ejection port near the muzzle via special ejection tube and falls out of the gun at the safe distance from the shooters' face. The details of this system is still unclear, but when combined with completely ambidextrous controls (FN P90 style), this makes the F2000 100% ambidextrous, any time.
Caliber: 5.56x45 mm NATO
Action: Gas operated, rotating bolt
Overall length: 694 mm
Barrel length: 400 mm
Weigth: 3.6 kg empty, in standart configuration; 4.6 kg with 40mm grenade launcher
Magazine capacity: 30 rounds (any NATO / STANAG type magazines)
f200s ar bullpups,then again i can be wrong
yep,I made a mistake,here's a link to a wikipedia article on the XM 29 http://en.wikipedia.org/wiki/XM29_OICW