First let me note I own 2 P3ATs and a KSG and have absolutely zero issues with them via 1000s of rounds. I wish I could say the same for my RFB. Up front questions: -Are newer bolts black? (nitride or the like vs the other coatings) -Should the bolt have a flat section where the 332 cam pin rides? -Should there be a stiff part of charging prior to hammer cock at approximately 1 inch pull? -After cocking should there be a stiff region approximately 2 inches into charge handle pull? -Should magazines require a slap so hard it is actually uncomfortable to the point after 10 mags you have the beginnings of bruises on your hand? (This one is interesting because the Metal FAL mags dont do this but the Keltecs do. The metal fal mags just have too much friction for the gun to cycle properly). Main issues: -Double feeds. -Failures to "extract". -Failure to "fully cycle". Been waiting years to get an RFB both due its new nature and hopefully allowing the "kinks" to be worked out but even simply finding one. Finally got one but unfortunately I went from excitement to WTF to "I gotta be doing something wrong" to disappointment and now "sure seems like somethings irreparably busted, its junk". This was purchased new and based off what I can tell it should be at least Gen 2 but the gas piston... I have no clue. Its as if these are made by a half dozen different outlets and they have a lottery as to what rifle gets what based off pictures I have seen and people spoken to in passing. I have approximately 280 rounds of PMC and Aguila through the system(200 PMC, 80 Aguila). I also have 6 keltec polymer mags and 3 metric metal FAL mags. Mags: -One of the keltec required being dismantled and areas sanded down as the front of the lift would not go all the way to the top consistently resulting in failures to feed. No other keltec mags had this issue. -The FAL metric metal mags while they fit better than the Keltec they are a what I would consider a complete and total failure to the extent they might even be dangerous. They seem to have far too much friction (tight fit for round) for the RFB to extract them. Ammo: -Neither worked better or worse than the other and neither has any issues whatsoever in other firearms so I seriously doubt its an ammunition issue. At this point which includes numerous cleanings using numerous methods to the point of a full field strip including gas piston etc and readjusting the gas repeatedly shot by shot single round per mag etc with consistent ammo I can say without question from a firearm perspective this thing is 100% unreliable. That is not to say it fails every time but rather so often and seemingly randomly you would almost be better off with zero success vs the 20-40% failure rates in every possible way from feeding and extraction to cycling. About the only issue I have not seen is weak strikes etc. I have not had a single 20 round magazine fully cycle and most have had 3-5 failures each run with some having 1 failure. There seems to be no reason as to how many rounds are in mag before failure. Usually the failures are a lack full cycling and not failure to feed. This would indicate a gas issue but the most consistent I have seen is around 12 clicks open and no amount of burning ammo and even click at a time adjustment has made resolved this. Also most failures result in mangled casings as seen in the picture associated with the keltec mag. Regarding gas adjustment if I have it open too far it never cycles. Too closed and the failures are a crap shoot. Again 12 seemed to be the "sweet spot" for all of this ammo but it was still, for all intent and purpose, unreliable. The system came at 17 out of the box. I have yet to contact Keltec nor the shop as I like to try and definitively determine its not user error on anything I work with before going back to them. Call it the engineer in me. I have Flitz'd areas of wear to snot slick. The action is smooth other than two sections (see pictures). This made some difference but it was marginal and so small it may simply be perception. Total and complete loss at this point aside from contacting Keltec etc. I'd much rather prefer this just work like my other Keltec firearms and be a content owner. edit: Charge pull length were from a dump I had originally and contained typos etc. The first stiff point is around 1" and the second 2".