From Handguard to RIS

[Kolin]

Hey there on my CA m15a4 sportline I want to upgrade my handguard.....but here is the fun, the battery is in there...and its a dual piece...well needless to say most RIS systems im finding are a single piecer. However I found the Dboys M4 RIS (m-45) Which is a two piecer...but the question is will it fit in the same things my handguards do? by all sizes and apperances should excpet where i am skeptical is where it locks into the gun. on the bottom of the piece you can see that tabs in which it would lock but im not seeing this on the top, or maybe im missing something? Here is the link to the Item http://rsov.com/index.php?target=pro...roduct_id=2164



Thanks for the help guys!