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Posted: 7/10/2018 7:13:17 PM EDT
[#1]
Continued...
The only ammo that seems to work 100 percent is truncated cone 147 grain fmj. Hotter124gr. NATO ammo exhibits the exact same problem, including hammer reset issues, as experienced with weaker 115gr Federal fmj. Dropping the total bolt/buffer weight to 19oz. has no positive effect, even with hot ammo. Jamming combined with hammer reset issue was still there. The ejector rides very close to the bolt and rubs slightly at the top, so I polished the contact points and it does not seem to inhibit bolt movement. The feed ramp on the mag block cannot be adjusted. My next troubleshooting move would be to put the upper, magblock, and buffer setup on to a different lower & trigger mechanism I have and see if I continue having the same problem. After that, I'm stuck on what to do. I am approaching the limits of my troubleshooting skills. Thoughts and suggestions from people who have had similar problems would be greatly appreciated! |
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Posted: 7/10/2018 7:54:36 PM EDT
[#2]
Send me the barrel....I can fix....and we have a new mod for bolts that is nothing short of amazing.....
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Posted: 7/10/2018 8:04:20 PM EDT
[#3]
Had the same problem with an early manufacture BA barrel. Rudy is your answer - it feeds anything now that he re-cut my feed cone.
Rudy, what is this bolt mod you speak of?
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Posted: 7/10/2018 8:08:37 PM EDT
[#4]
I tried several things trying to get one particular 9mm SBR to work, 2nd round would appear to go into battery but would never fire.
The trigger wouldn't reset, and the live round would need to be mortered. If I put the same round back into the top of the mag - it'd load and fire, but the next one wouldn't. Glock mags, ammo didn't matter. Rudy's barrel with his magic chamber milling fixed it, now it works every time. I have faith that Rudy knows how to fix stuff. |
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Posted: 7/10/2018 8:16:03 PM EDT
[#5]
@ MaconArmory Thank you, sir! I sent you an email. I appreciate any and all help I can get at this time. I really want this setup to work.
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Posted: 7/10/2018 8:29:35 PM EDT
[#6]
I agree with what everyone says here. My AR9 had similar issues. I got lucky in mine all I had to do was sand off the coating on the barrel extension face and inside the chamber then get the metal to a mirror polish. Now it runs like a top.
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Posted: 7/10/2018 8:58:07 PM EDT
[#7]
Quote HistoryQuoted:
Had the same problem with an early manufacture BA barrel. Rudy is your answer - it feeds anything now that he re-cut my feed cone. Rudy, what is this bolt mod you speak of?  trying to not let the cat out of the bag..........It made 10mm blowback on a New Frontier lower feed like silk, it fed well with our feed cone.....but it is wicked smooth with the bolt mod.....saving it for our new bolt I am designing .......trying to put everything I have learned over the last few years into our Macon Armory Branded products.....I'll put my barrels up against any of them.....and now our bolts and buffers.......next complete rifles 
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Posted: 8/1/2018 12:33:54 PM EDT
[#8]
Quick update... well, not much of an update, but...
I received the modified barrel and bolt in good condition and re-installed/re-assembled the unit several weeks ago. The work done by Macon looks very nice. I still have not had a chance to get out to the range. The weather and my schedule have not been cooperating. Hand-cycling snap-caps has been perfect, where before they would frequently jam. As soon as I can get to the range I'll post another update, but considering how well hand-cycling works, my spirits are definitely lifted. |
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Posted: 8/1/2018 10:00:30 PM EDT
[#9]
I didn’t bother with a mod of my malfunctioning barrel; just bought a Macon barrel instead. My Spikes AR9 has been flawless since then. Promoted to HD gun.
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Posted: 8/2/2018 8:58:53 PM EDT
[#10]
Quote HistoryQuoted:
I didn’t bother with a mod of my malfunctioning barrel; just bought a Macon barrel instead. My Spikes AR9 has been flawless since then. Promoted to HD gun.
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Posted: 8/3/2018 8:29:07 AM EDT
[#11]
Very happy I bought Macon Armory barrel for my 9mm pistol build,900 plus rounds through no issues
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Posted: 8/5/2018 1:30:43 PM EDT
[#12]
Just a few thoughts... ( And Rudy is the man )
What trigger are you using ? A lot of after market triggers do not reset properly with the variety of ramp lengths on the various manufactures BCG's. . Be sure to clean out any rust preservative / gummy stuff from the inside of MetalForm mags... you'd be surprised how gummy the follower and interior of the mag body can be. I use a rag, with a car wax "cleaner" version and a rag wound / spun , so it can be fed through the mag, apply car wax cleaner... and work it back and forth. Removing the gummy stuff... use another clean rag the same way, to remove the dried wax. Buff the mag follower the same way... maybe even do this first so you can see what I am talking about. All that polishing / gummy removal... ( while a pita ) will allow the mag parts and spring etc to keep up with the cyclic speed of the BCG. Also , consider a stronger recoil spring. I actually run ( and love ) a .308 Tubbs flatwire recoil spring in my 16" barreled Colt Pattern 9MM PCC... ( YMMV since it is a 4.5" ) And the Tubbs Flatwire will work with a ton of buffer tube lengths and buffers... because it is a Flatwire... it takes up less room when fully compressed While so a strong recoil spring sounds crazy... Even JP Industries has this to say about there .308 recoil spring..."9mm Carbines: This is the buffer spring we recommend for use with 9mm carbines. I installed the Tubbs to help keep down the "Bark and Blast" from my 16" 9MM PCC... it slows down the cyclic speed just by milliseconds... leaving the breach closed a little longer, while pressures drop... and slows the cyclic speed enough to make the recoil impulse more pleasant... much easier to stay on target, for follow up shots as well. My 16" Colt Pattern runs great with the various added parts ( I also use a 7.5ish oz buffer weight ) and has been very reliable with over 129 different brand ammos... the only issues from all those brands, were from the ammo... not the carbine ( SIG V-Crown HP's just to danged wide to feed reliably .. or poor ammo construction , not enough neck tension on certain "cheap" brands of ammo... or Aluminum cased ammo with poly coated bullets. Make sure you check the BCG over travel between the bolt hold open and the face the bolt.... insert a empty mag, to actuate the BHO... and fully depress ( not with the charging handle ) via a punch or something non-marring , the BCG into the buffer tube. If your over travel is greater then 3/16" ... then you run the risk of breaking a bolt catch. The overtravel can easily be fixed with the 25 cent quarters in the bottom ( under the recoil spring and buffer , shoulder end ) buffer tube trick... stack as needed to make the over travel 3/16ish... not less the that since the mag follower needs to be allowed enough "time" to keep up with the cyclic speed of the BCG. |
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Posted: 8/5/2018 7:00:30 PM EDT
[#13]
I built two 9mm ars using Macon 5in barrels, bolts, buffers, psa lowers and nfa side charging uppers. They ran 100% first time out. Have not shot them anymore, because I am form oneing the lowers and building big ass form one reflex cans for them.
So, without going into what the bolt mod is, can you tell me if it would be something you could do to the 9mm bolts I already purchased and would it work well with a glock mag lower and suppressed? Sorry for the hijack. James |
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Posted: 8/5/2018 8:46:32 PM EDT
[#14]
Quote HistoryQuoted:
I built two 9mm ars using Macon 5in barrels, bolts, buffers, psa lowers and nfa side charging uppers. They ran 100% first time out. Have not shot them anymore, because I am form oneing the lowers and building big ass form one reflex cans for them. So, without going into what the bolt mod is, can you tell me if it would be something you could do to the 9mm bolts I already purchased and would it work well with a glock mag lower and suppressed? Sorry for the hijack. James
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Posted: 8/13/2018 8:39:57 AM EDT
[#15]
Range Update (finally) - good news and bad news
Ran the following: 5 metalform mags - 4x30rd, 1x10rd 2 promag mags - 2x25rd (heavily modified to work right - and they do!) 174 rounds of: Federal 115gr round nose FMJ (relatively low velocity) full box American Eagle 147gr truncated cone FMJ full box Winchester 124gr NATO round nose FMJ Remington 115gr JHP Suppressor used for 1/2 of the 147's. Everything fed perfectly, even suppressed! Thanks Rudy!!!! Now the bad news. The 124 NATO rounds had 3 stovepipes during extraction/ejection and one really bad jam with the empty stuck inside the action above and to the left of a newly partially fed round. Now that the Winchester NATO is on sale, I picked up a bunch and would like to get this setup to work with it. All stovepipe jams were stereotypical - the rim of the case was trapped between the bolt and the front of the ejection port with another round behind it part-way in the chamber. The ejector appears to be where it should be relative to the slot in the bolt and the face of the ejector is parallel to the bolt face. All empities that ejected fine went about 5-15' at 3-4 o'clock All of the empty cases have black 1/2 way down one side of the case which doesn't look unusual. No bulging. Since everything ejects fine except the NATO, I figure it's either the dimensions of the Winchester case rims interacting with the extractor, or the extra blowback pressure from the NATO rounds causing the extractor to pop off the case rim early (guessing here). Or something else? I can increase the bolt weight to slow it down a bit using the currently removed interal bolt weight (removed to fit the LAW folding plug). It will just have to be trimmed to fit with the LAW adapter in place ($0 cost solution), or get a heavier buffer (>$0 cost solution). Thoughts? |
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Posted: 8/13/2018 8:14:02 PM EDT
[#16]
Post a pic of the ejector from the side......I can probably walk you through the fix.....what little of that ammo I have shot has been pretty anemic though.....
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Posted: 8/14/2018 9:52:38 AM EDT
[#17]
I did a little research after posting and I think we both came to the same conclusion - the ejector isn't hitting the back of the cartridge case correctly. I looked at the ejector again and adjusted it so that it is touching the bolt on the side and top without restricting bolt movement, and re-faced the front with a file so that it is flush and parallel with the bolt face. It needed a fair amount of cleaning up. I also filed off the stamping burrs from the left, right, and top. I gave the top and face a gentle rub with 600 grit emery paper.
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Posted: 8/18/2018 11:14:33 PM EDT
[#18]
Follow up....did the ejector adjustment solve the issue?
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Posted: 8/24/2018 7:20:29 AM EDT
[#19]
Rudy, thanks for asking! I live in the suburbs, the range is an hour and a half round trip, and work/family obligations have been keeping me from getting there. I should be able to give it a thorough test in the next couple of weeks.
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Posted: 8/27/2018 12:19:28 PM EDT
[#20]
Made it out to the range this weekend and had the same exact issue. The 124 grain NATO rounds still won't eject properly. In fact, the jams were worse, with the case mouths completely crushed. This is really annoying because I have so much of this ammo.
I saw in another thread that someone suggested tweaking the ejector downward a little. I'll bring some pliers with me next time and make a series of different adjustments to see if I can get it to work. I may even make a trip to the nearby local indoor range despite their ridiculous hourly pricing just to save me the 1.5 hour trip. If that doesn't work, I'm switching to an entirely new magwell adapter, for Glock mags this time, and will see if that will work with this barrel/bolt setup. If it does, I'll put the KAK adapter and Colt-style magazines up for sale as a package deal for someone else to mess with. |
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Posted: 8/28/2018 5:56:21 PM EDT
[#21]
Downward probably isn't gonna help...you want the nose of the ejector as close to the bolt and as high in the groove as you can get it.
Loose the buffer spacer and get an extended buffer......do you have a standard buffer spring.....?Just had the combo of a carbine length buffer spacer and heavy spring cause what you describe......went with a standard spring ond one of our buffer....ran like a swiss watch. If you want to try one of our buffers let me know.... |
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Posted: 8/29/2018 8:46:03 PM EDT
[#22]
Hi Rudy, I'm willing to try if you are. I'll send you an email.
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Posted: 9/10/2018 8:29:06 AM EDT
[#23]
Good news - the Macon Armory 7.5oz. buffer from appears to have done the trick. Although some of the Winchester NATO empties would just barely trickle out of the ejection port, they did get out. Slowing down the action with the heavier buffer appears to be giving the weak ejecting empties enough time to find their way out. 150 rounds of Win NATO, and no ejection failures. Plus by spreading out the recoil impulse with the deadblow moving weight in the buffer, the whole system has significantly less felt recoil. Very significantly.
I swapped the Colt adapter for the Stern Defense Glock mag adapter and had one stovepipe in four (17 rd.) mags, so not too bad, but it looks like the Colt mag setup is more reliable with this crappy Winchester NATO ammo, which I DO NOT RECOMMEND. I'm very disappointed with this stuff. I've never had much luck with Winchester and I'll be staying away from now on. At least I can swap between a Colt mag and a Glock mag setup in about 30 seconds on the range with these 2 adapters. Variety is the spice of life. |
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