piston drive

[Big Tom]

Anyone installed one of the new type operating systems on an existing M-16. Will they work and how well?

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[jmoore]

I've shot The H&K 416- very nice for suppessor use or sustained full auto. Otherwise, well, buy it if you like it. It won't hurt anything. (a good quality kit at any rate won't hurt.) There have been some developmental problems but the market place is sorting it out.