Originally Posted by Roko
Problem, though, is that things such as magazines, are very hard to get. 5 of the realistic 43rd magazines with fake rounds in them will cost me about $250 and some change at my doorstep, opposed to buying, in your case, full-metal M4 magazines. Believe full-metal M4 magazines sell for like 90$ at your doorstep for 5? Correct me if I'm wrong, please, don't want to mislead the man, heh.
The only way you're going to get a top rail as well, is if you mount one yourself manually, or you dump the cash for a HurricanE 552, although worth the money, it is quite the expendature.
Motor's can also be a bit of a pain if you ever plan to upgrade one. As far as I know, the motor a SiG 552 takes only fits other SiG series guns, and the PSG-1. A lot of places I've visited don't even market a medium sized motor, so it usually requires an oversea's order, which I guess isn't too bad if you plan to do overseas orders. Tune up kits can also be a pain, as there isn't a big variety for the SiG. I've only found one on WGC, and it's not the type I'm even looking for (I'm going high-speed build). Result being you have to order the parts separately, which sometimes costs a little bit more.
Ordering from Asia isn't that bad, I order all my mags including mags with dummy rounds from overseas. Fake plastic dummy rounds are not illegal as far as I know, only "deactivated ammunition" is but of course there is still a risk, higher than a normal parts order. Twice now I have had the box covered with the yellow customs tape and the P90/AUG mags with dummy rounds are out of the packages and strewn around the box but never missing. I dislike the look of the short mags and I used the MAG midcaps when I had mine. A 5 pack of King Arms metal armalite mags would probably be less than $90 shipped, probably closer to $70.
TM and several other companies make top rails for the 552, have for MANY years. Very easy to install, no modification necessary.
SystemA makes medium type motors in both Turbo and Magnum and then of course there are stock TM motors. Both are commonly available overseas and don't cost any more than a standard short or long motor.
I VERY much dislike full tune up kits, I find there is always something in there that will cause a problem as no company makes the best of every part. Other than the nozzle everything else is standard ver.3 so ordering
parts to upgrade it is dead easy. Ver.3 guns have a standard tappet for all models of gun (I like Guarder), standard cylinder (Modify), same cylinder head as I believe an AUG (Modify), 6mm bushings (King Arms) or bearings, snag some SystemA all helical highspeed gears, Prometheus piston, ventilated piston head (Modify), SystemA magnum motor (higher torque AND speed than the turbo, SystemA admitted this in a PDF press release about the revolution mechbox.)