Ha ha, VD's up to his usual tricks again!

Just to clear up mis-information.

Both are piston cup designs.  That is where they are similar.  However, the LWRC piston system has actually been engineered.  It is self regulating with staged gas vent.  In that regard the LW is more similar to the HK 416 in operation than KKF.  

The 416 does this in reverse using a piston in a hole with tapered gas plug and a front vent hole.  The LW does it by using a straight walled nozzle, and steps on the inside of the piston and then 3 circumforentially placed vent holes to dump all residual at the end of the stroke.  

Critical tolerence dimension call outs on the LWRC system are .0005".  The other one looks like it holds the dimension of the true value hardware grade 8 bolt that was turned into a piston with a garage mill, not to mention the washer holding it together and the toilet flusher spring.  Hey, KUDOs to KKF.  He did a good job with the resources at hand.  Thats the kind of stuff that makes one a good gunsmith.  

The system is more than a piston cup, nozzle and spring.  The LW system has a completely proprietary bolt carrier and key.  The key ever so slightly sloping to vector the forces on the carrier in a manner that carrier tilt is eliminated.  The addition of a boss base on the back of the bolt carrier also to prevent the possibility of bolt bounce related to carrier tilt.  It ELIMINATES all possibility of carrier tilt.  

LW also has a pressed steel bushing in the receiver to prevent bind and wear on the receiver from the op rod, guide it precisely.  Every part is made of the appropriate material, exotic or otherwise.  The system strokes 6/10ths of an inch.  LW uses a teflon coating process on the carrier and piston parts along with sandstrom inside the upper receiver so it can be used dry in desert environments where oil may not be such a good idea.  

Another difference is KKF's has likely not been carried into harms way.  Members of the 3rd, 5th, 7th SFG have all carried LWRC's systems into battle.  The result has been a growing following in that community.  

Another difference. Almost 3 years of development, testing, and close to a million bucks.  How about 71,500 rounds on a LWRC piston gun, no cleaning.  Each component costs mucho to manufacture and measure to ensure tolerence.

If you really want to know who came up with the system because you are so short sighted, you think this is new technology do a search on the Mauser Maschinenkarakiner Gerat 06 (1944), it is identical to the KKF sytem.  That system was studied by the LWRC engineering staff including Paul Leitner-Wise.  The trick is engineering a known working piston system and improve it to work with the AR platform so that it is not a strap on dildo, but a complete system.  Now, that system only REMOTELY and only aesthetically appears similar.

I am only responding to this to clear up misrepresentation by "former" member of this board.  There is a member here who has decided his personal goal in life is to dick with LW.  He trolled our forum, etc.  He was never a customer, just a professional troll.  He has since been confronted by site staff and all of a sudden these bogus threads are popping up.

Oh, one last difference.  If you call LWRC, you can get an SOC shipped to you TODAY.

Anyway, I just didn't want this misinfo propagated unchecked, but we don't have time, nor the desire to enter a pissing match grade school games if that is what dinger wants.  It does give the opportunity to explain the system.  If you need more info, please go to the LWRC industry forum and ask there and we will respond double quick time.

Thanks!