Neomet Posted May 2, 2019 Share Posted May 2, 2019 Okay, a question for all you bleeding edge of technology folks who have racked up some significant round counts on your Gen 3s. How reliable have they been? The cautious members of the herd want to know. Link to comment
Fasthenk65 Posted May 2, 2019 Share Posted May 2, 2019 3 hours ago, Neomet said: Okay, a question for all you bleeding edge of technology folks who have racked up some significant round counts on your Gen 3s. How reliable have they been? The cautious members of the herd want to know. Super topic... my MPX is nearly here... Wanna know (please only good news) Link to comment
jlo86cj Posted May 3, 2019 Share Posted May 3, 2019 I just passed 5,000 on my GEN2 Sig MPX PCC since getting it in February. No problems at all. Like the new bolt carrier much better. Disclaimer: I sold the folding stock, trigger, barrel and handguard before firing the first shot. Installed my old GEN2 parts (ACE stock, Hiperfire trigger, ILWT 10.5" barrel, +20 recoil springs, NLA charging handle and Isler handguard). Link to comment
NervousEnergy Posted May 3, 2019 Share Posted May 3, 2019 I've got ~11000 on my Gen 2. Extractor spring failed around ~7500 rounds... found out it's recommend to replace it at 5000, so my bad. They cost a buck each or so with the plastic insert from Taccom. Disconnector spring failed in the Hiperfire Eclipse at ~10,000. Replaced it with the unused spring in the OEM trigger. So far only around 600 rounds on the Gen 3. Broke it in & sighted it with 200 rounds, then shot it in the Silver Dollar match (12 stages, one day, no cleaning.) Ran perfectly. Not a high round count, of course, but there are numerous improvements in the design. My Gen 2 threw brass shavings into the upper and lower for the first 5000 rounds or so. Never an issue feeding, but it seems for many Gen 2 MPXs the left side feed ramp wasn't smooth or slightly misaligned. No such issue with the Gen 3. The new slide-in action of the spring assembly is really nice for cleaning. The new handguard is a dream, and the Timney is so close to the Hiperfire that I'm not switching it out. The extractor spring appears heavier duty with a thick O-Ring at the base. The only thing on the gen 3 that disappoints me is the charging handle. The tongue on the spring retainer keeps the upper from getting scuffed at the back, but doesn't do anything to keep the handle solidly in the grove and prevent binding. The NL spring retainer ($40) is at least required, and getting the whole package will get you much wider handles. Link to comment
Rolex Posted May 3, 2019 Share Posted May 3, 2019 8 hours ago, jlo86cj said: I just passed 5,000 on my GEN2 Sig MPX PCC since getting it in February. No problems at all. Like the new bolt carrier much better. Disclaimer: I sold the folding stock, trigger, barrel and handguard before firing the first shot. Installed my old GEN2 parts (ACE stock, Hiperfire trigger, ILWT 10.5" barrel, +20 recoil springs, NLA charging handle and Isler handguard). JO- I have a set of the +20 springs- never used them- shot the first match saturday at AC with the 8" sig barrel and the comp you gave me- Outstanding! What will the +20 spring do for me/you? Link to comment
DocMedic Posted May 4, 2019 Share Posted May 4, 2019 (edited) Oh boy.. "Gen 3" pcc - is just past 600rnds, no issues Gen 2 - was at 6k+, only craps out at major matches Gen 1 - 12k+, gun will not make it through a full mag without jamming. Gen1 has been sent back to SIG once. Still not 100%. The Gen2 is actually my gen1 lower with gen2 upper with 4" barrel to keep it SBR legal. I have not moddified the PCC variant in anyway yet. Fingers crossed hoping this one last longer. Edited May 4, 2019 by DocMedic Link to comment
Neomet Posted May 4, 2019 Author Share Posted May 4, 2019 5 minutes ago, DocMedic said: Gen 2 - was at 6k+, only craps out at major matches Hahahahahaha... Oh, how the painful truth can make me laugh. It is why the GMR 15 is still in the safe. Link to comment
2011BLDR Posted May 4, 2019 Share Posted May 4, 2019 #1 gen 2 started having issues @ 25-30K.... Started trouble shooting and applying "fixes" in parallel on the # 2 gun and induced the same issues I. #2 gun... Backed out and went down the opposite path and resolved everything in bouth guns ... Have shared my path elsewhere on hear and been drowend out by others promoting the path that didn't work out for me.. Link to comment
Neomet Posted May 4, 2019 Author Share Posted May 4, 2019 Kevin, we need you to get a Gen 3. You are a round count monster! Link to comment
2011BLDR Posted May 5, 2019 Share Posted May 5, 2019 Shot a G3 side by side with my G2's several times.. my G2's with the MBX Comps have less dot movement especially on the bolt closeing phase + the shorter OAL... I don't see me needing a G3... Link to comment
2011BLDR Posted May 9, 2019 Share Posted May 9, 2019 I did upgrade to a gen 3 Carrier and spring guide for the #1 gun with the 30K + rounds fired ... Link to comment
DocMedic Posted May 13, 2019 Share Posted May 13, 2019 On 5/9/2019 at 3:56 PM, 2011BLDR said: I did upgrade to a gen 3 Carrier and spring guide for the #1 gun with the 30K + rounds fired ... How were you able to convince Sig to end you a Gen 3 BCG?!?! Link to comment
2011BLDR Posted May 13, 2019 Share Posted May 13, 2019 50 minutes ago, DocMedic said: How were you able to convince Sig to end you a Gen 3 BCG?!?! 4 Phone calls, and I had to pay for the parts. I needed to address the abnormal gouging in this upper from: over gassed loose ejector bad design of the dovetail interface of the carrier and the spring guide Link to comment
PewPewJohnson87 Posted May 16, 2019 Share Posted May 16, 2019 Did Sig open up the gas system on the Gen 3? I know this was an issue with the previous generations. Link to comment
SergioSF Posted May 16, 2019 Share Posted May 16, 2019 1 hour ago, PewPewJohnson87 said: Did Sig open up the gas system on the Gen 3? I know this was an issue with the previous generations. Gen 1: .0625” Gen 2: .0469” Gen 3: .055” Link to comment
PewPewJohnson87 Posted May 16, 2019 Share Posted May 16, 2019 36 minutes ago, SergioSF said: Gen 1: .0625” Gen 2: .0469” Gen 3: .055” So I guess you could say they found the "sweet spot"? I have heard of cycling issues on the MPX's and from what I have read on here, most of it seems to be ammo related. I have a trade offer for a Gen3 that I am entertaining hence my curiosity. Link to comment
Neomet Posted May 16, 2019 Author Share Posted May 16, 2019 2 hours ago, PewPewJohnson87 said: Did Sig open up the gas system on the Gen 3? I know this was an issue with the previous generations. Remember now that the Gen 3 has a pivoting bolt carrier and as best I can tell stronger recoil springs. There is more at play here than just the gas port size. Link to comment
PewPewJohnson87 Posted May 16, 2019 Share Posted May 16, 2019 6 minutes ago, Neomet said: Remember now that the Gen 3 has a pivoting bolt carrier and as best I can tell stronger recoil springs. There is more at play here than just the gas port size. This is info I did not know, thank you sir. Link to comment
jlo86cj Posted May 17, 2019 Share Posted May 17, 2019 I measured the recoil springs from the new PCC model and they are the same weight as the original gen2's. Also, Rob@ILWT has noticed the port size on the new 16" barrel was .048" and some of the 4.5" barrels lately were .052". Link to comment
Neomet Posted May 18, 2019 Author Share Posted May 18, 2019 Are you saying my "rack the bolt" spring measure is out of calibration?? Link to comment
jlo86cj Posted May 18, 2019 Share Posted May 18, 2019 Lol, so was mine. I thought the same thing when I got the new gun. It was probably the small charge handle compared to my NLA. I rigged up a fixture in my vise and found they were identical to the original gen 2’s. Link to comment
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