A good CQB tool made by VFC which is now available for US$230 at RedWolf Airsoft... "At barely 16 inches long, the baby M4 is an incredibly compact little tyke and yet incorporates the entire working set that is an M4 albeit one with a very short barrel (about 5 inches). Built around the E-series M4, this weapon performs like an AEG but wields like a large pistol; stronger users will find it weight very manageable as a heavy pistol in one hand (Arclight attests to this).
Slap in a short VN hicap mag and you have a conceal carry SBR, alternatively it makes a nice compact secondary for a bolt action or an interesting dual-primary carry to compliment a machine gunners MG with something to switch to in tight quarters.
The short rail system incorporates the full four sides of rail allowing a host of accessory options far more then a normal pistol and its full length upper rail comes bundled with flip-up front and rear iron sights. The weapon itself is a good solid all-metal construction with all the right materials in the right places; most critically for such a build, the metal body is great quality and rock solid stable. The battery storage solution offered comes in the form of the included dummy PEQ battery box, the receiver end cap adds a nice rounded finish and the included trigger guard is of the ergonomic variety; all in all, quite the spicy little firecracker.
Many veteran Airsofters have planned such modguns for years and many actually go through and build them despite the pain of planning, building and not too shabby fortune of expense but now you can simply, easily and economically buy one good to go right out of the box!"