ICS just released today two new great looking items for you to use in your existing ICS AEGs, their MX5 series, and the SIG-552. The first one is the SFS stock which is a radical-new design that'll make your MP5 ubercool. The second one if is the Quad Rail for the ICS SIG-552 which will allow you to put accessories on this AEG from top, sides, to bottom.

ICS S.F.S. Stock
ICS MP-88 S.F.S. stock is designed to provide a most comfortable and most convenient operation experience. There are so many similar parts and accessories for MP5 style AEGs. You want something different. ICS S.F.S. is the only choice for you.
http://www.icsbb.com/EDM/SFS/en/index.html

ICS MRS Quad Rail Tactical Handguard for the SIG 552
You are looking for dirrent parts and accessories for your SIG 552 but you can find few. ICS hear your demand and ICS is working very hard to design and manufacture this NEW SIG tactical handguard, ICS SIG MRS Quad Raol Tactical Handguard (MI-37). ICS SIG quad rail tactical handguard utilizes Module Rail System which is developed by ICS.

The material used to build the handguard is the aluminum allow for aerospace industry. There are rails on each side of the handguard.

It's compatible with the M-1913 Picatinny standard. Whatever accessories compatible with the M-1913 can be installed on the ICS SIG MRS quad tactical handguard. Another feature is its modular design. You don't need to be use gas valve to unlock the upper handguard. ICS designed a big battery room inside the SIG MRS quad rail handguard.

It can hold up to 12v Ni-MG battery (4-3-3_. There is a battery protect plate in the upper handguard. It can fix the battery inside the handguard and protect the battery from BB hits.

http://www.icsbb.com/EDM/MRS/EN/