CMK has been marketing a series of replacement gun barrels and resin mantlets for various armor kits for the last year or so. Frankly, it is a great idea. First of all, it gives the builder a nice, quality barrel that doesn't need to be drilled out. You also don't need to worry about some of the longer barrels being warped and mold seams are a thing of the past. 

What's even better, is that you get a high quality resin mantlet with each one to replace the often inferior one that comes with the kit. Each set also includes a short instruction page to assure that you get your parts properly installed. This particular set is for a 75mm Sherman M4A1 and should make a real difference on your next Sherman.

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