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Originally Posted By Joker23: I replied to the last email I got from support. Their response was basically "buy a new rifle or upper". Who in their right mind would buy the spring loaded ejector one instead of the FE version especially when they are the same price??? Hmm...do I want the one that has a spring that can wear out or do I want this piece of steel in there that never wears out for the same price? |
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Originally Posted By Jmacken37: Amphibian for the win! I didn't think about that reciprocating mass. I'm consistently impressed by you! The PhaseII forced me try something different and now I'm at a total of 15.4oz. I'm sure the FE Banshee will be an all steel carrier so similar to my old Banshee |
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Originally Posted By amphibian: I think it is crazy that they list the original spring loaded ejector and FE Banshee's at the exact same price. Who in their right mind would buy the spring loaded ejector one instead of the FE version especially when they are the same price??? Hmm...do I want the one that has a spring that can wear out or do I want this piece of steel in there that never wears out for the same price? Originally Posted By amphibian: Originally Posted By Joker23: I replied to the last email I got from support. Their response was basically "buy a new rifle or upper". Who in their right mind would buy the spring loaded ejector one instead of the FE version especially when they are the same price??? Hmm...do I want the one that has a spring that can wear out or do I want this piece of steel in there that never wears out for the same price? Most initial buyers probably arent aware of the issue until it happens. |
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Originally Posted By muzzleloader: Most initial buyers probably arent aware of the issue until it happens. Originally Posted By muzzleloader: Originally Posted By amphibian: Originally Posted By Joker23: I replied to the last email I got from support. Their response was basically "buy a new rifle or upper". Who in their right mind would buy the spring loaded ejector one instead of the FE version especially when they are the same price??? Hmm...do I want the one that has a spring that can wear out or do I want this piece of steel in there that never wears out for the same price? Most initial buyers probably arent aware of the issue until it happens. |
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Originally Posted By amphibian: Understood....just seems like making more work for themselves if users come back later saying....I need my springs replaced etc... Agreed. I hope CMMG steps up to the plate and offers the stripped upper and bolt at a significant discount to those of us stuck with the original. Would be nice if it was a free replacement, but I doubt it. I dont think that they have ever officially acknowledged a problem with the ejector. |
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Originally Posted By muzzleloader: Agreed. I hope CMMG steps up to the plate and offers the stripped upper and bolt at a significant discount to those of us stuck with the original. Would be nice if it was a free replacement, but I doubt it. I dont think that they have ever officially acknowledged a problem with the ejector. Just checked their website. $925 for an upper. I've never paid that much for a complete rifle. I really hope they offer just the necessary parts at some point. I know, I know... I'll go be poor somewhere else. |
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Originally Posted By backbencher: Be very interesting to see what the cuts on the bolt carrier & bolt look like to accommodate the fixed ejector. Carrier will be slotted just like the 9mm Dissent for the fixed ejector. Carrier also has the cam pin slot further back just like the Dissent |
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Originally Posted By amphibian: I bet it won't be a surprise... ass end will be like a Banshee with a 1/4 hole for the tuning weight. Elongated bolt like used in the Dissent to clear the fixed ejector. Probably use 50 degree bolt lugs like the 9mm Banshee. Probably same key they use on the Banshee. Carrier will be slotted just like the 9mm Dissent for the fixed ejector. Carrier also has the cam pin slot further back just like the Dissent Originally Posted By amphibian: Originally Posted By backbencher: Be very interesting to see what the cuts on the bolt carrier & bolt look like to accommodate the fixed ejector. I bet it won't be a surprise... ass end will be like a Banshee with a 1/4 hole for the tuning weight. Elongated bolt like used in the Dissent to clear the fixed ejector. Probably use 50 degree bolt lugs like the 9mm Banshee. Probably same key they use on the Banshee. Carrier will be slotted just like the 9mm Dissent for the fixed ejector. Carrier also has the cam pin slot further back just like the Dissent Yep. I'm just trying to think of what can be reused from the AR ejector to the fixed ejector. Barrel? Bolt is being replaced, carrier being replaced, upper is proprietary. Would be nice if they could offer the upgrade parts at a reasonable cost to existing owners. |
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Originally Posted By backbencher: Yep. I'm just trying to think of what can be reused from the AR ejector to the fixed ejector. Barrel? Bolt is being replaced, carrier being replaced, upper is proprietary. Would be nice if they could offer the upgrade parts at a reasonable cost to existing owners. |
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As previously mentioned earlier in the thread, I've been having the same failure to eject issues that others have been having, but last weekend I shot my faux MP5SD 9mm upper with a YHM R9 and the heaviest weight from the action tuning kit on it on a buddy's FRT lower with a heavy buffer and it ate 4 mags on simulated full auto fire without a single hiccup. I swapped it to my primary AR's lower with an A5H2 buffer (5.33oz) and Geissele Super 42 rifle spring and I also did not have an issue. Seems like my issue is the BCG running too quick with the standard Q Shorty Stock buffer and spring? Considering I dumped 4 mags without a single issue on what was practically full auto ROF, it has to be. I'm going to order the Maxim Defense heaviest (non PCC) buffer and see if it fixes my issue with the Q Shorty Stock. |
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Originally Posted By Alien: As previously mentioned earlier in the thread, I've been having the same failure to eject issues that others have been having, but last weekend I shot my faux MP5SD 9mm upper with a YHM R9 and the heaviest weight from the action tuning kit on it on a buddy's FRT lower with a heavy buffer and it ate 4 mags on simulated full auto fire without a single hiccup. I swapped it to my primary AR's lower with an A5H2 buffer (5.33oz) and Geissele Super 42 rifle spring and I also did not have an issue. Seems like my issue is the BCG running too quick with the standard Q Shorty Stock buffer and spring? Considering I dumped 4 mags without a single issue on what was practically full auto ROF, it has to be. I'm going to order the Maxim Defense heaviest (non PCC) buffer and see if it fixes my issue with the Q Shorty Stock. I was interested about the action tuning kit. They sent me a new bolt and and action tuning kit after my most recent issues. I haven't been able to test anything with it yet. My last range session was dedicated to my new CCW. Hopefully as the weather warms up, I'll get more opportunities to test some things with the 9mm upper. |
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Originally Posted By Joker23: I was interested about the action tuning kit. They sent me a new bolt and and action tuning kit after my most recent issues. I haven't been able to test anything with it yet. My last range session was dedicated to my new CCW. Hopefully as the weather warms up, I'll get more opportunities to test some things with the 9mm upper. Originally Posted By Joker23: Originally Posted By Alien: As previously mentioned earlier in the thread, I've been having the same failure to eject issues that others have been having, but last weekend I shot my faux MP5SD 9mm upper with a YHM R9 and the heaviest weight from the action tuning kit on it on a buddy's FRT lower with a heavy buffer and it ate 4 mags on simulated full auto fire without a single hiccup. I swapped it to my primary AR's lower with an A5H2 buffer (5.33oz) and Geissele Super 42 rifle spring and I also did not have an issue. Seems like my issue is the BCG running too quick with the standard Q Shorty Stock buffer and spring? Considering I dumped 4 mags without a single issue on what was practically full auto ROF, it has to be. I'm going to order the Maxim Defense heaviest (non PCC) buffer and see if it fixes my issue with the Q Shorty Stock. I was interested about the action tuning kit. They sent me a new bolt and and action tuning kit after my most recent issues. I haven't been able to test anything with it yet. My last range session was dedicated to my new CCW. Hopefully as the weather warms up, I'll get more opportunities to test some things with the 9mm upper. Has anybody tried the CMMG Radial Delayed Blowback BCG with the Maxim Defense Roller Delayed Buffer? I was thinking that if my issue is that the BCG is moving too fast, then the Roller Delayed Buffer might slow it down to a reliable velocity without further increasing the reciprocating mass (which defeats the whole purpose of the Radial Delayed Blowback system), but I'm hesitant to drop another $180ish on a buffer after already spending $80 on the 5oz PDW buffer. I'll obviously wait to see how well it works with the 5oz buffer before spending additional money, but wasn't sure if this would muck things up. |
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Originally Posted By Alien: I got the 5oz Maxim buffer and I'm waiting until my next range trip the weekend after next to try it out with the heaviest action tuning kit weight. Has anybody tried the CMMG Radial Delayed Blowback BCG with the Maxim Defense Roller Delayed Buffer? I was thinking that if my issue is that the BCG is moving too fast, then the Roller Delayed Buffer might slow it down to a reliable velocity without further increasing the reciprocating mass (which defeats the whole purpose of the Radial Delayed Blowback system), but I'm hesitant to drop another $180ish on a buffer after already spending $80 on the 5oz PDW buffer. I'll obviously wait to see how well it works with the 5oz buffer before spending additional money, but wasn't sure if this would muck things up. https://www.ar15.com/forums/AR-15/-ARCHIVED-THREAD-Maxim-Defense-RDB-review/15-780933/?page=7  Maxim RDB +CMMG RDB |
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Originally Posted By amphibian: Yes....only the barrel. Originally Posted By amphibian: Originally Posted By backbencher: Yep. I'm just trying to think of what can be reused from the AR ejector to the fixed ejector. Barrel? Bolt is being replaced, carrier being replaced, upper is proprietary. Would be nice if they could offer the upgrade parts at a reasonable cost to existing owners.  |
Just released: https://cmmg.com/fixed-ejector-retrofit-kit-9mm  You can see how the fixed ejector is secured to the upper (just like the Dissent). Bolted from the inside of the upper.  |
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Originally Posted By amphibian: Just released: https://cmmg.com/fixed-ejector-retrofit-kit-9mm https://cdn11.bigcommerce.com/s-7ngaea0tdq/products/2569/images/9109/99BA69C-AB_1__17361.1745420686.1280.1280.jpg?c=1 You can see how the fixed ejector is secured to the upper (just like the Dissent). Bolted from the inside of the upper. https://cdn11.bigcommerce.com/s-7ngaea0tdq/products/2569/images/9110/99BA69C-AB_2__93807.1745421140.1280.1280.jpg?c=1%22 I emailed them asking when retrofit kits would be available and they told me never  |
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Originally Posted By chevrofreak: I emailed them asking when retrofit kits would be available and they told me never |
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Originally Posted By amphibian: LOL...wow....they did post on Reddit that they would have retrofit kits back when they announced it....sounds like their people need to work on their consistency. This was my question: "I have several of the Banshee 9mm uppers that I have stopped using because the ejector problems made it so they could be used for maybe 1 practice session before a match, or I would start having a bunch of ejection failures during a course of fire. I would like to convert them to the new Fixed Ejector design; will you be selling upper and BCG kits to those of us that would like to save some money upgrading our equipment?" This is their response: "The new fixed ejector BANSHEE and RESOLUTE are not “fixes” for the existing models. They are an addition to our product offerings that utilize technology that was introduced with our DISSENT line. Your BANSHEE and RESOLUTE models still have our Lifetime Quality Guarantee, and if you are having issues with yours, we will work with you to resolve those issues and get your firearm running as intended. If you choose to retrofit your existing models, the only offerings we have now for you to choose from are complete upper groups with stripped upper receiver and bolt kits coming mid-year." I ordered one, even though they aren't supposed to exist. |
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Originally Posted By amphibian: Isn't their last sentence these new retrofit kits? I somehow glossed right over that after all of their previous smoke blowing and just latched onto the complete upper part. Their whole response irritated me, because they refuse to admit that their Banshee design just didn't work with a spring loaded ejector in 9mm. |
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Originally Posted By Joedirt199: I wonder if the new bolt would work with a PSA AR-V lower so I can use my CZ Scorpion mags. Even if you could, are you aware the upper would need to be clearanced for the wider Scorpion mags? https://c3junkie.com/?page_id=2102 |
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Originally Posted By backbencher: Happiness is a Dremel away. Originally Posted By backbencher: Originally Posted By Joedirt199: Yeah I think you're right. The lower has a feeding cone and ejector sticking up. Happiness is a Dremel away. |
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Originally Posted By amphibian: Not if the front and rear take down pins are closer together than Mil-Spec like I posted earlier. Originally Posted By amphibian: Originally Posted By backbencher: Originally Posted By Joedirt199: Yeah I think you're right. The lower has a feeding cone and ejector sticking up. Happiness is a Dremel away. Not if the front and rear take down pins are closer together than Mil-Spec like I posted earlier. You don't really need a front take down pin. The bolt carrier going rearward straightens things out in my experience. At least it did w/ my 5.7 Lyndon - AR trigger jig, thumbhole stock, AR 57 upper. |
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Originally Posted By backbencher: You don't really need a front take down pin. The bolt carrier going rearward straightens things out in my experience. At least it did w/ my 5.7 Lyndon - AR trigger jig, thumbhole stock, AR 57 upper. Originally Posted By backbencher: Originally Posted By amphibian: Originally Posted By backbencher: Originally Posted By Joedirt199: Yeah I think you're right. The lower has a feeding cone and ejector sticking up. Happiness is a Dremel away. Not if the front and rear take down pins are closer together than Mil-Spec like I posted earlier. You don't really need a front take down pin. The bolt carrier going rearward straightens things out in my experience. At least it did w/ my 5.7 Lyndon - AR trigger jig, thumbhole stock, AR 57 upper. We are talking about feeding from the lower and 9mm. I highly doubt that is going to work reliably with no front take down pin and relying soley on the rear take down pin. |
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Originally Posted By amphibian: The AR57 feeds in the upper. We are talking about feeding from the lower and 9mm. I highly doubt that is going to work reliably with no front take down pin and relying soley on the rear take down pin. Originally Posted By amphibian: Originally Posted By backbencher: Originally Posted By amphibian: Originally Posted By backbencher: Originally Posted By Joedirt199: Yeah I think you're right. The lower has a feeding cone and ejector sticking up. Happiness is a Dremel away. Not if the front and rear take down pins are closer together than Mil-Spec like I posted earlier. You don't really need a front take down pin. The bolt carrier going rearward straightens things out in my experience. At least it did w/ my 5.7 Lyndon - AR trigger jig, thumbhole stock, AR 57 upper. The AR57 feeds in the upper. We are talking about feeding from the lower and 9mm. I highly doubt that is going to work reliably with no front take down pin and relying soley on the rear take down pin. You're probably right. 
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Well, it appears I am very late to the game. I have a AR I built several years ago with a standard AR upper and lower, and a 16in RDB bolt and barrel. Looking at my order history, I bought the RDB bolt and barrel, and one of their stripped uppers on 9-7-20. It has been running fine, but I have only put a few hundred rounds through it. However over the weekend I put another 150 rounds through it and now I am having failure to eject issues. Total round count is probably in the 300-500 round area as of right now. I do a little searching and find this thread. While I have not had time to read through the whole thing, it appears from what I have read, the issue is the ejector springs. It also seems they will send new bolts to those having issues, but it seems even those have issues too. Sounds like I do not want to screw with even trying to get the spring ejector issue fixed, as it sounds like it is a temporary fix until it happens again. Sad that I would have to spend another $430 to fix it. |
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Originally Posted By Jeeps-And-Guns: Well, it appears I am very late to the game. I have a AR I built several years ago with a standard AR upper and lower, and a 16in RDB bolt and barrel. Looking at my order history, I bought the RDB bolt and barrel, and one of their stripped uppers on 9-7-20. It has been running fine, but I have only put a few hundred rounds through it. However over the weekend I put another 150 rounds through it and now I am having failure to eject issues. Total round count is probably in the 300-500 round area as of right now. I do a little searching and find this thread. While I have not had time to read through the whole thing, it appears from what I have read, the issue is the ejector springs. It also seems they will send new bolts to those having issues, but it seems even those have issues too. Sounds like I do not want to screw with even trying to get the spring ejector issue fixed, as it sounds like it is a temporary fix until it happens again. Sad that I would have to spend another $430 to fix it. Indeed. I really don't want to reward CMMG's crappy customer service and denial that this is a problem by giving them another $430 |
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Originally Posted By Gotterdammerung: Indeed. I really don't want to reward CMMG's crappy customer service and denial that this is a problem by giving them another $430 But they kinda have us by the balls. Either try another bolt with springs that will probably only last about as long as the old ones, or fork out the money for the fixed ejector. It would be nice if they offered this kit at a discount for those who have the problematic older style. |
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Originally Posted By Jeeps-And-Guns: But they kinda have us by the balls. Either try another bolt with springs that will probably only last about as long as the old ones, or fork out the money for the fixed ejector. It would be nice if they offered this kit at a discount for those who have the problematic older style. Originally Posted By Jeeps-And-Guns: Originally Posted By Gotterdammerung: Indeed. I really don't want to reward CMMG's crappy customer service and denial that this is a problem by giving them another $430 But they kinda have us by the balls. Either try another bolt with springs that will probably only last about as long as the old ones, or fork out the money for the fixed ejector. It would be nice if they offered this kit at a discount for those who have the problematic older style. @Aimless is a lawyer who likes fish. Maybe class action, or merely the threat of a class action? |
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Originally Posted By Joedirt199: I didn't have any problems with their customer service. They sent a sent of springs free of charge and a new bolt when they thought they had it sorted out. I gave up when those items didn't fix it and it became a problem many were dealing with. I bought the barrel and bolt and built the upper myself. It worked fine for about a thousand rounds and since then I've had the same problems everyone else on this thread has. When I called CMMG they acted like they never heard of the issue and suggested it was probably the non-CMMG parts causing the problem. Since I didn't buy a complete CMMG gun, they didn't do squat for me. Read the copy on this new product on their website. They say there is nothing wrong with the old in-bolt ejector system. They just changed it because some people may see improved performance. The reviews on their webpage are full of people bitching about FTE issues with zero replies addressing it. Fuck CMMG. I loaded up on spare springs and the BCM kits so that will keep me good for awhile but after this retro fit kit roll out with zero support for those with the flawed version, I'll throw the old one out before giving them another penny. |
| Yeah after begging for the suspected updated bolt and getting it free, I never even installed or tried it. I was getting the feeling from the messages back and forth that they were done trying to figure out the first gen versions. It now sits in parts in the parts bin. Mine was the same as your's, bolt and barrel purchase with standard AR accessories. I put my efforts into the PSA AR-V with Maxim Delayed Buffer without any issues. The Scorpion mag lower is a bonus. |
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Originally Posted By Gotterdammerung: I bought the barrel and bolt and built the upper myself. It worked fine for about a thousand rounds and since then I've had the same problems everyone else on this thread has. When I called CMMG they acted like they never heard of the issue and suggested it was probably the non-CMMG parts causing the problem. Since I didn't buy a complete CMMG gun, they didn't do squat for me. Read the copy on this new product on their website. They say there is nothing wrong with the old in-bolt ejector system. They just changed it because some people may see improved performance. The reviews on their webpage are full of people bitching about FTE issues with zero replies addressing it. Fuck CMMG. I loaded up on spare springs and the BCM kits so that will keep me good for awhile but after this retro fit kit roll out with zero support for those with the flawed version, I'll throw the old one out before giving them another penny. While part of me agrees with this, what other options are there? It is either get the fixed ejector parts, or go back to straight blowback (which I do not want to do). Or you can go to something like the mean arms bearing delayed uppers, but those are $1500. |
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Originally Posted By Jeeps-And-Guns: While part of me agrees with this, what other options are there? It is either get the fixed ejector parts, or go back to straight blowback (which I do not want to do). Or you can go to something like the mean arms bearing delayed uppers, but those are $1500. Mean Arms system has the same FTE problems. See the thread on here somewhere. JP5 is the easy button but pricey. Scheel's Roller Delayed Buffer if you want to keep using your endomags. |
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Originally Posted By Gotterdammerung: Mean Arms system has the same FTE problems. See the thread on here somewhere. JP5 is the easy button but pricey. Scheel's Roller Delayed Buffer if you want to keep using your endomags. Originally Posted By Gotterdammerung: Originally Posted By Jeeps-And-Guns: While part of me agrees with this, what other options are there? It is either get the fixed ejector parts, or go back to straight blowback (which I do not want to do). Or you can go to something like the mean arms bearing delayed uppers, but those are $1500. Mean Arms system has the same FTE problems. See the thread on here somewhere. JP5 is the easy button but pricey. Scheel's Roller Delayed Buffer if you want to keep using your endomags. When talking about full auto options for a 9mm M16 variant, $500 isn't much relative to the price of a transferrable M16 variant. I go through all the options I know of and list them all on my site here: https://c3junkie.com/?page_id=361 IMHO, the CMMG RDB is the ONLY option for smooth, reliable 9mm M16 that I wouldn't have any reservations about putting on an expensive transferrable lower receiver. That said, if you've read my website and posts, I do NOT think the stock CMMG RDB is that smooth either. It has the potential to be once you select the right buffer tube, buffer and spring. I also take it a step further with my custom aluminum carrier extension w/ a biased weight that kind of mimics how a real German MP5 carrier has tungsten powder inside of it. I would really like to see CMMG offer the FE Banshee retrofit kit for .40SW, just so I could get my hands on the .40SW bolt which would have less aggressive angles on the bolt to incur more delay to the action (this is how I ran my old 9mm Banshee 9mm using a .40SW bolt to run 9mm). Or maybe sell the bolt separately like they do for the 9mm / 40SW / .45ACP / 10mm as a bolt 'rehab' kit or whatever for the older spring loaded ejector Banshee's. |
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So I got to shoot my faux MP5SD over the weekend after installing the 5oz Maxim buffer/spring in my Q Shorty Stock and the super safety. The first mag of Federal HST 147gr had 3 failures to eject properly and I was bummed. HOWEVER after that it started running beautifully and I don't recall a single malfunction after the first mag. The rest of the 7-9 mags was a mix of 147gr AAC, 124gr Remington, and whatever ammo my buddies loaded mags with to shoot it with on super safe. It was beautiful in super safe and it brought a smile to everybody's face. The 147gr ammo was very quiet with the R9 suppressor, and hearing it "typewritering" along without issue was great. VERY controllable on super safe, and I was hitting nearly all rounds on a small AR500 silhouette target that was about 15+ yards away, which was pure music to my ears.  I should probably clean it. I theorize though, that the heavier buffer and the super safe system are robbing/absorbing enough of the energy from the the BCG to keep it from being too energetic and causing FTEs, though maybe I'm wrong. I may still get the fixed ejector BCG and upper for peace of mind. It'll still be cheaper than an MP5SD, though I'm still doing to want one of those one day.  |
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Originally Posted By amphibian: I also take it a step further with my custom aluminum carrier extension w/ a biased weight that kind of mimics how a real German MP5 carrier has tungsten powder inside of it. Have you tried the Spikes Tactical T2? I buy those in bulk for my AR builds because I like them so much. |
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Originally Posted By chevrofreak: Have you tried the Spikes Tactical T2? I buy those in bulk for my AR builds because I like them so much. They followed my advice and bought several different tungsten powders in varying sizes to determine their optimal size and then got them in 5 gallon containers. I remember them telling me how much money they made on them in a year and I didn't get a penny. Then I heard someone there saying they wanted to patent it and I told them that is ridiculous since it is originally done by HK..... at least to my knowledge. I wouldn't be surprised to see that other companies may have done the same. All that said, they did give me a few for testing. Back then Kynshot wasn't around and my go-to buffer was probably an old AAC buffer but then the roll pin broke on mine. I ran my old MGI buffer a lot. I used to run a lot of full auto 7.62x39. The tungsten powder buffers didn't have as much of a dead blow hammer affect as the MGI, AAC or H2, H3 in my experience so I never used them as much. |
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Originally Posted By amphibian: +1, I was extremely disappointed with the FTE issues I had with the MEAN. Spent $1500 on it and sold it for $1000. $500 mistake. When talking about full auto options for a 9mm M16 variant, $500 isn't much relative to the price of a transferrable M16 variant. I go through all the options I know of and list them all on my site here: https://c3junkie.com/?page_id=361 IMHO, the CMMG RDB is the ONLY option for smooth, reliable 9mm M16 that I wouldn't have any reservations about putting on an expensive transferrable lower receiver. That said, if you've read my website and posts, I do NOT think the stock CMMG RDB is that smooth either. It has the potential to be once you select the right buffer tube, buffer and spring. I also take it a step further with my custom aluminum carrier extension w/ a biased weight that kind of mimics how a real German MP5 carrier has tungsten powder inside of it. I would really like to see CMMG offer the FE Banshee retrofit kit for .40SW, just so I could get my hands on the .40SW bolt which would have less aggressive angles on the bolt to incur more delay to the action (this is how I ran my old 9mm Banshee 9mm using a .40SW bolt to run 9mm). Or maybe sell the bolt separately like they do for the 9mm / 40SW / .45ACP / 10mm as a bolt 'rehab' kit or whatever for the older spring loaded ejector Banshee's. Originally Posted By amphibian: Originally Posted By Gotterdammerung: Originally Posted By Jeeps-And-Guns: While part of me agrees with this, what other options are there? It is either get the fixed ejector parts, or go back to straight blowback (which I do not want to do). Or you can go to something like the mean arms bearing delayed uppers, but those are $1500. Mean Arms system has the same FTE problems. See the thread on here somewhere. JP5 is the easy button but pricey. Scheel's Roller Delayed Buffer if you want to keep using your endomags. When talking about full auto options for a 9mm M16 variant, $500 isn't much relative to the price of a transferrable M16 variant. I go through all the options I know of and list them all on my site here: https://c3junkie.com/?page_id=361 IMHO, the CMMG RDB is the ONLY option for smooth, reliable 9mm M16 that I wouldn't have any reservations about putting on an expensive transferrable lower receiver. That said, if you've read my website and posts, I do NOT think the stock CMMG RDB is that smooth either. It has the potential to be once you select the right buffer tube, buffer and spring. I also take it a step further with my custom aluminum carrier extension w/ a biased weight that kind of mimics how a real German MP5 carrier has tungsten powder inside of it. I would really like to see CMMG offer the FE Banshee retrofit kit for .40SW, just so I could get my hands on the .40SW bolt which would have less aggressive angles on the bolt to incur more delay to the action (this is how I ran my old 9mm Banshee 9mm using a .40SW bolt to run 9mm). Or maybe sell the bolt separately like they do for the 9mm / 40SW / .45ACP / 10mm as a bolt 'rehab' kit or whatever for the older spring loaded ejector Banshee's. Sucks to see the mean systems are not any better. It looked like a very interesting design and I liked how it came with the different wedges to alter the delay. Glad I did not jump in and buy one. I inspected my bolt a little closer and the ejector is very weak. I can push it down probably a little over 1/16th in with no resistance and then not much more about half way down before I start getting meaningful resistance. |
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Originally Posted By Gotterdammerung: Mean Arms system has the same FTE problems. See the thread on here somewhere. JP5 is the easy button but pricey. Scheel's Roller Delayed Buffer if you want to keep using your endomags. If I was to go with the roller delayed buffer, I would have to also get a new barrel and bolt. So the buffer system, bolt, and barrel all together is going to far exceed the cot of the cmmg FE kit. So sadly, the FE retrofit is going to be my cheapest option. My current upper looks to be pretty much standard AR flat top, so I can at least reuse that with other projects/builds, leaving only the old spring ejector BCG as trash. So at least there is that. |
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Originally Posted By Jeeps-And-Guns: Sucks to see the mean systems are not any better. It looked like a very interesting design and I liked how it came with the different wedges to alter the delay. Glad I did not jump in and buy one.  They obviously never did that which is why I was using a .40SW bolt to run in my 9mm. I also ran a 10MM RDB bolt in my .40SW RDB. Now, they didn't change the bolt angles for the new FE Banshee from the Dissent.  So I have to get additional delay with my custom CE and spring loaded weight. If CMMG releases a .40SW retrofit kit I may buy it just to get the bolt for using it in 9mm. I saw they posted that they would come out with a 10mm retrofit kit. I may get one just for running .40SW since I have a lot of that brass to lose. |
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