As mentioned by Nigther in the forums, PGC have two new parts coming January 2007. There’s a new cslide for the Marui Glock 17, an 8mm gearbox for the M4 (CNC milled by the looks of it) and also a rather decent looking hopup chamber for the AK47 series:
This new AK Chamber, with full CNC manufacturing technology and, set up on the gearbox independently which provides faster testing and high accuracy when shooting.
M4 8MM GEAR BOX will release in January. Improvement includes installation, HOP-UP, and mechanism of shooting. Thus increase performance when using.
SLIDE and BARREL for MARUI G17 will release on JAN 2007. (PGC)