03-15-2011, 03:27 AM
This link was discussed on another forum:
http://www.nxtbook.com/nxtbooks/nra/ssusa_201102/#/18
and is a comparison of the two methods keeping a lot equal. A dominate concept presented is impact of the piston on the bolt. However, I do not see much impact as the bolt and spring loaded piston appear to be in full contact before the trigger is pulled. The piston seems to push the bolt rearward when the gas gets behind it.
I enjoy this cleaner, cooler action in my LWRC rifles (4) which are accurate for me (especially the .308 Repr), but I am am having a bit of issue with my #2 6.5 Saber equipped by factory with Adams piston. (10% stove piping discussed in Troubleshooting). The piston designs are different, and the Adams bolt spring is still a mystery to me. But when it shoots it is a tack driver at 200 yards! But so does my direct impinge #1, dirt and all.
And my other piston rifles Scar 17 and FNAR have not missed a lick yet, nor have my Galil or ak-47. Now I have had a few issues with a pair of old M1 Garrands but cleaning the piston tube corrosion solved that.
http://www.nxtbook.com/nxtbooks/nra/ssusa_201102/#/18
and is a comparison of the two methods keeping a lot equal. A dominate concept presented is impact of the piston on the bolt. However, I do not see much impact as the bolt and spring loaded piston appear to be in full contact before the trigger is pulled. The piston seems to push the bolt rearward when the gas gets behind it.
I enjoy this cleaner, cooler action in my LWRC rifles (4) which are accurate for me (especially the .308 Repr), but I am am having a bit of issue with my #2 6.5 Saber equipped by factory with Adams piston. (10% stove piping discussed in Troubleshooting). The piston designs are different, and the Adams bolt spring is still a mystery to me. But when it shoots it is a tack driver at 200 yards! But so does my direct impinge #1, dirt and all.
And my other piston rifles Scar 17 and FNAR have not missed a lick yet, nor have my Galil or ak-47. Now I have had a few issues with a pair of old M1 Garrands but cleaning the piston tube corrosion solved that.