引用:
原帖由 F22 於 10-11-2009 07:41 發表 
VLTOR官網話13"........
You try to use 14.5" and cut 1.5" off and see what it looks like. No need to argue because I have done it. It is 12.5".
From MM:
"Vltor Weapons Systems debuted their new M4K upper at the 2007 SHOT show. It's built on a Vltor VIS-1, carbine length Bi-lithic upper receiver. The M4K enables an M203 to be mounted on a shorter barrel than an M4, resulting in a more compact package when maneuverability and compactness is a priority. It accomplishes that with a modified M4 barrel, and proprietary flash hider. Also shown is the new Vltor gas block with integral front sight. Photos were supplied by Vltor.
Receiver - VIS-1carbine length Bi-lithic upper receiver.
Barrel - The M4K barrel is a chrome-lined M4 barrel, shortened to approx 12.5". It uses a carbine-length gas system. The extra barrel length past the gas block adds reliability over a shorty of 10.3" or 11.5".
Vltor M4K Comp/Flash hider - The M4K flash hider incorporates the M203 barrel clamp/mount shoulder needed to attach the M203 to the weapon. Why not just cut the barrel forward of that shoulder? Vltor designed the M4K hider to be compatible with hider-mounted supressors like the HALO, which attach over the hider and tighten by butting up against the rear of the hider. If a crush washer is used, the supressor can be misaligned when tightened, as it doesn't have a nice shoulder to index against. By incorporating the M203 shoulder into the rear of the flash hider body, the crush washer/hider interface is eliminated, providing a good surface for supressor mounting. A blank-firing adapter groove is also included. The flash hider has five dual ports, and is non-indexing. Vltor will also offer a version without the M203 shoulder, as a direct replacement for the standard hider."
