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[zakcng 0]

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[Mack 1,322]

Its a clone rifle so Id hazard a guess at a clone ACM rail to go on it, either free float or drop in there are plenty to choose from.

[zakcng 0]

Could you recommend or link me one as I have no experience with rail system will it fit on the delta ring and what holds it on at the front?

[Mack 1,322]

First up the drop in RIS, Its held in place by the delta ring and the cap behind the front triangle sight, Heres a cheap dboys one

 

http://www.ebairsoft.com/dboys-style-cqbr-p-5238.html

Next up you have a free float rail. It removes the delta ring and attaches directly to the receiver via the barrel nut and bolts, eliminating the need for the front sight and giving you a full length continous upper rail.
heres a picture for refrence and a link below



http://www.jdairsoft.net/product.aspx?id=19391


I cant say for certain if they will fit as all airsoft guns are made to diferent specs and may require slight modding to fit propperly.