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Old December 31st, 2015, 23:40   #6
Privateer Airsoft
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Join Date: Dec 2008
Location: Beaverbank, NS
The M15a4 will be exactly the same on the inside. The only difference is the externals. is what you have. Any 2015 model CA guns will have the same guts and specs.
I change primaries like other people change socks.
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