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 Swapping an AIM CHF upper to a SAR rail?
gadgetguy1288  [Team Member]
1/29/2012 10:19:01 PM
I want to put a SAR rail on the CHF upper I purchased a while back from AIM, but other than the rail and the a gas block, what would I need?

I was looking at the micro gas block but the note on the page says it wont cover the holes left by the FSB?

What about if I wanted to switch to a piston system, I know spikes sold a piston kit at one point but I dont see it on the site anymore. Is this something that is still made? If not, what kit would be best to get and what other parts would I need?
midwestoffroad  [Team Member]
1/30/2012 12:17:45 AM
Just pull the fsb and put some flats or dimples on the barrel for the gas block and your good to go. No piston system anymore
TXN_Infidel  [Member]
1/30/2012 7:56:21 AM
Originally Posted By gadgetguy1288:
I want to put a SAR rail on the CHF upper I purchased a while back from AIM, but other than the rail and the a gas block, what would I need?

I was looking at the micro gas block but the note on the page says it wont cover the holes left by the FSB?

What about if I wanted to switch to a piston system, I know spikes sold a piston kit at one point but I dont see it on the site anymore. Is this something that is still made? If not, what kit would be best to get and what other parts would I need?


Many piston kits out there now. Adam Arms makes them, CMMG carries kits, and many many more stock them as well.