What's the easiest mod for 4D Mag?

dw51

Enlightened
Joined
Jul 28, 2006
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216
Location
Iowa
My uncle is all impressed by the 4C, 3D Mag mod and now wants me to improve his 4D Mag. What's available for a simple mod? Will a XPR 103 hold up to 4D's? Or is there a way of putting 5? C's in there (and if so, what bulb)? I haven't begun to play with it yet and I thought I'd do a little homework here first. Thanks in advance.
 
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