Thread: M4 s.i.r.
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Old January 5th, 2010, 22:25   #9
Privateer Airsoft
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Join Date: Dec 2008
Location: Beaverbank, NS
Originally Posted by StrikeFreedom View Post
I was planning to go this route until I found out that most SIR/CASV won't fit CA's top receiver.
I thought that too, but I have an 09 model CA m15a4, and a King Arms CASV, and it fit without an issue.
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