If you need a better rails system for the Magpul PTS Masda ACR, then you should take a look at this Echigoya Custom RAS Handguard for Magpul Masada ACR which runs the full length of the handguard for the short-type barrel version of the ACR. Looking at the photo, you get rails for the Left, Right and Bottom sides of the AEG, more accessories for you to attach then.

This can fit the A&K Masada version too and is T6 CNC'd with black and tan colours available. Price is set at US$220 and you'll need to contact Echogiya if you intend to order.