Quote:
Originally Posted by Fox Hound
why are the m4 cylinder's not compatible with the M16 ptw? Is it because of the barrel length?
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M4 cylinders are not immediately compatible with some M16 models, mainly Gen 1 and 2 M16. The cylinder lock of Gen 3 and newer is on the cylinder itself, while on the older M16 it is on the buffer cap. You either need to install a Gen 1 or 2 spring guide onto an M4 cylinder, or better yet, replace the stock tube, and spring guide with a MAX stock pipe kit. Jugglez has them for $150. This way, you can buy all new cylinders at any time, and use them in the M16.
The M16 cylinders have been discontinued for some time now, but there may be a few floating around out there.
It also bears mentioning that Gen 1 used a larger hop-up I.D. than newer guns use. So, you would also need to install a new cylinder head (complete with nozzle) on the older cylinder to be able to use it in a newer gun.