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Matrix M4 CQB-R Convertible Barrel Adapter / Extension Set (14mm-)
by Andy H. Date Added: September 16, 2008
John, these are outer barrel sets. It has no effect on your bb shooting what so ever. There are shells for your inner barrel.

If your inner barrel is bent, you'll want to replace that. Also, if your gun shoots hard you might want to consider using heavier bbs.

If it shoots over 350 fps you'll want to use at least Matrix 0.23g or 0.25g.

Also, if your hopup is too high, bbs will curve a lot, especially when wrong bbs are used.

Rating: 5 of 5 Stars! [5 of 5 Stars!]
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