tt350z
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Posts posted by tt350z
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Finally got to try out a CMMG radial delayed gun today. One of the guy I shoot with had a Banshee that basically wouldnt eject. I told him I’d take a look at it and found that his ejector only had like #3 of pressure. I pulled the ejector spring out and it was considerably shorter than a new spring. He said he only had like 300 rounds through that spring since he replaced the original spring for ejection issues.
The MEAN Arms blows the CMMG out of the water in all shooting attributes. It is way softer, flatter, and way more consistent ejection. The only thing the CMMG has the MEAN Arms best is cost, but I am so glad that I spent the extra money on the MEAN Arms.
I haven’t added any new update simply because this thing has been running perfectly with zero malfunctions or quirks. It’s been used for matches twice a month and has not been cleaned since I switched to the optional lifter back in December 2023.
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Dot matrix
Paint pen or nail polish is probably the most common
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No problem!
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@glock24
Give them a call.My buddy said they have some buffers (probably a secret stash), $7 each. Dont know who’s gonna assist, but if you ask for Carter he’ll know what you’re talking about and should be able to assist.
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On 3/12/2024 at 7:35 PM, telligentgunner said:
If someone like Align Tactical or thumb rest [generic] USA creates a thumb rest to replace the takedown lever, will it clear or is there enough room to modify the holster for one to fit?
Please post a pic of a top down view with and without the gun inside.
It’s gonna depend on the shape of the takedown lever. I have the Shadow 2 holster but I wouldnt be worried about any rigidity issues if I had to dremel out a pocket between the mount holes. The material is very strong.
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My friend works at The Attic and shoots a Redback. I could ask him if he has any spare buffers if you need.
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I found the 510 didnt get bright enough for me during bright conditions. YMMV
507 Comp would be a great option.
I’m personally running a Vortex UH-1 gen 2. I prefer it over the Eotech due to having no shroud giving it a cleaner sight picture.
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I use a DAA Lynx with ratchet. Inner belt velcro stickness doesnt matter
much since it’s cinched tight. A collapsible inner belt matters more. Good thing is DAA has a super cheap cinchable belt.
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Check out the MEAN Arms bearing delay upper for another option.
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A heavier hammer spring does take more energy for the slide to start moving back. So in theory, you could lighten the recoil spring and not batter the frame. Again, I’ve never scientifically tested this, just my guess.
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22 minutes ago, GeneBray said:
Think your comment is stop on. A typo on the #7 main spring?
Sorry yea. Meant to say #17
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Probably because 2011’s run much heavier mainspring, like #7, 19, 21. Most Shadows commonly run #11.5 to keep the DA pull weight down since their being used in DA/SA divisions.
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Did you perhaps use pliers to squeeze the mag body to remove the basepad? Could’ve crushed the body enough to cause the follower to bind.
Do you get this failure when hand cycling a full mag? Or is only during live fire?
I’m not implying any user error. Just brainstorming a bit.
I have recently picked up a TTI +10 and it’s been working with no issues without having to blend or break in the OEM 33 round mag. My TF Goliath also works with no problems.
ETS worked in mine until after the last round when the bolt picked up the follower and shoved it into my breech. My bolt goes over the follower of Glock mags as it should. -
56 minutes ago, Tampa-XD45 said:
Now that you've shot a match with it ... do you think it's worth $1,500 ? Would you buy it again?
I’d buy it again in a heartbeat. I enjoy this platform much more than the MPX. It’s nice to run my preferred stock (UBR) without having to buy a conversion kit for the MPX. The MPX was also beating up my Hiperfire Eclipse hammer, as I can see circular marks the edges were starting to shows signs of mushrooming. Also nice to be able to tune the buffer system to your preference with any standard AR parts and not 9mm specific parts.$1,500 is pricey for an upper, but I feel the performance is worth it. I’m assuming most people already have a running AR, this worked perfect slapped onto a standard AR lower with no need to change anything. The only limitation is that you cant hold more than 30 rounds until they start delivering their 40 round mags and that you cant short stroke it, which is why I eventually got a dedicated glock mag lower.
Someone asked about spare parts and this was MEAN’s reply:
The uppers include the MEAN Lifetime Warranty, which means that we'll always fix or replace the product. All maintenance for the Bearing Delay upper is free (including parts and labor) if the customer ships the upper to us. For customers who want to perform their own maintenance, the first PM Kit is shipped free for any Bearing Delay upper, at the customer's request.
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The Holosun is still plenty bright, it’s not like it unusable or anything. It’s just an observation that it doesnt go full nuclear bright and a Trijicon/Aimpoint. It’s only like a half brightness setting below that.
My carry gun has the EPS Carry on it, not concerned about reticle brightness at all.
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3 hours ago, Bdh821 said:
Looks like it would be ejecting brass into my face if i shot it LOL.. aka not lefty friendly
I’d definitely slap on a 9mm brass deflector if I was a lefty.Heck, I can get a cheap 3d printed one and slap it on for science and left handed shots.
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23 minutes ago, dmshozer1 said:
Is it harder to charge than a normal blow back rifle?
Nope. It’s the exact same given equal spring rates. -
21 hours ago, Texaspaul said:
has anyone else broken an ejector spring?
ETA:
12/29/23
Shot another 120 rounds yesterday to test out some new buffer configurations.
First configuration:
Short stroked Armaspec SRS Carbine buffer with nylon spacer from Home Depot and an additional spacer for the secondary spring to increase preload on the BCG. I did not encounter any light strikes with it this time. I’d have to say this reduced muzzle movement like 10% compared to the short stroked Tubbs AR flatwire/carbine buffer setup.
Second configuration:
Short stroked Tubbs AR spring and Kynshot 5000HP. My friend had one that he was not going to use so I asked if I could try it out before he returned it. My oh my. I thought my gun was flat before but this combo was even flatter. I did 6 shots of doubles at 15 yards and could cover the entire 12 rounds group with just 3 pasters. I was almost stacking bullets on bullets with the doublesBCG stroke bottomed out. Buffer is not bottomed out.
BCG and Kynshot buffer fully bottomed out
12/31/23
Shot a 2 gun match today. Over 1000 rounds now with no ejection issue.I did have a load that must’ve had a half charge because it did not cycle the BCG enough to pick up another round and sounded weak as well. RO and spectators noted that it sounded funny on that malfunction as well.
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6 hours ago, dmshozer1 said:
Great information on the Mean's upper,
A few questions if you don't mind.
Are you using the Mean's with a dedicated 9 lower with the ejector removed?
I’m using an Aero Precision EPC9 with the ejector removed. I had zero issues with the endomags in the 5.56 lower. The benefit of going to a dedicated Glock lower is you can short stroke it since the mag is set forward. Cant really short stroke the endomags because it sits at the back.
Do you know if the handguard can be changed out with a normal aluminum one?
Yep, handguard can be replaced. This barrel nut is proprietary to this handguard so that would need to be swapped as well.
Do you think a normal AR barrel nut can be used to replace the handguard?
Yep, you can use a standard AR barrel nut
What trigger are you using in the lower?
Hiperfire Eclipse
How much do the lifters cost?
$45 each
Thanks
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Just wanted to post my experience with the MEAN Arms bearing delay upper now that I've had it a few weeks. I don't reload so all ammo I've shot is factory Fiocchi 115gr @ 1200 FPS.
Placed my order for the 14.5" barrel on 11/6/23. Received the upper 11/22/23.
Comes with the completely assembled upper receiver with the "K" lifter installed
2 ejectorless endomag inserts for PMAG's Gen 2/3.
"H" lifter
Instruction manual
Complete 14.5" upper assembly weight
Barrel extension with bearing pockets
BCG has not gas key, so the BCG rides on steel rails to prevent the BCG from rotating
Complete BCG weight
Bearings in locked position
Bearings in unlocked position
Spring loaded ejector on bolt face
Available lifters
Lifter selection chart
Lifter grooves for bearing
BCG with optional lifters
Configured weight minus mag with Gen 1 UBR
Configured weight with Gen 2 UBR
11/24/23
Got out to range to test out my 14.5” upper with the K lifter installed. AR-15 Lower has a Tubbs AR-15 flatwire spring and carbine buffer. Shot 120 round of Fiocchi 115 gr/1200 FPS and 23 rounds of Blazer Brass 147 gr/950 FPS according to the manufacturer.
They all shot flawlessly with strong ejection and locked back on an empty mag everytime.
The 115 gr shot softer with less muzzle jump than the 147 gr. It was pretty noticeable which was why I didnt bother to shoot anymore 147 gr. Definitely want to try the M and P lifter since the chart in the manual has the 115gr/1200 FPS at that intersection.
I love the polymer handguard. It appears to be a glass filled nylon and very closely matches the Gen 1 Magpul UBR, which is highly regarded and being an extremely robust stock. There is no flex to the handguard at all and feels great in the hands. Outside temp was in the low 20°, and it was a pleasure to hold them with my bare hands.12/4/23
Another 200 rounds through it this weekend. This time with a Aero Precision EPC9 Glock mag lower. It functioned perfectly with zero upper related issues. I was able to cause a misfeed if i rested the Glock mag on the bench and leaned forward, it changed the angle enough to cause a misfeed and was repeatable everytime. I did not run into any issues with using the mag as a monopod with the endomags.
Also, skip the ETS Glock mags. The EPC9 lower does not have LRBHO. I destroyed one my first time on the last shot when the mag went dry. The mag/follower sits at a different position so the bolt was able to pick up the follower and shove it into the breech. When I stripped the mag out of the lower, the follower came out of the mag body. Half of the follower was still in the breech and did not allow the bolt to return to battery. The bolt goes over the top of the OEM Glock mag follower.
Follower visibly out of the mag body and into the breech.
12/11/23
Shot about 200 rounds through mine at a USPSA match this weekend. Total round count is a little over 500.
Ran like a champ with zero malfunctions.
Fiocchi 115gr
K lifter
Armaspec SRS Gen 4/Carbine buffer with a cutdown recoil spring. The stock spring was oversprung for me, it took about #20 to compress (my Tubbs flatwire took about #14.5). I trimmed the spring till it took about the same force to compress.Ejector pressure after about 500 rounds. I didn't measure it out of the box. Another user measured his around 7 lbs 9 ozs out of the bow with the Wheeler gauge. He had ejection issues around the 300 round mark and his ejector pressure was in the 4 lbs range, turns out his ejector spring was broken.
12/17/23
Got my M and P lifters in yesterday. Went to the range to test it out.
Had a very interesting issue as my gun was getting so many light strikes almost every other shot regardless of what lifter was installed. So it was basically impossible to test out the recoil impulse since it was basically a single shot when it did fire. I noticed that it was very hard to extract a round when there was a light strike. When cycling the BCG with no ammo, there was a noticeable resistance and click before it went into battery. My original thought was the Armaspec SRS wasn’t going into full battery because i had trimmed the spring to lighten it up. I let my friend shoot it some and verified that on every light strike, the hammer strike would visibly push the BCG into battery. Spiltting the upper and cocking the hammer to fire it would work. At least this verifies that it will not fire OOB.
I took the BCG out when I got home to check the lifter/bearing interaction. When pushing the lifter into the bolt, I noticed that one ball was sticking and took some effort to push the lifter in regardless of which lifter I tried. It turned out to be the opening of small circlip that retains the ball bearing was lined up with one of the bearings, so when it unlocked, it pushed the bearing in further and wedged itself in that gap. I took a scribe and pushed the circlip so the opening was not lined up with the bearing. This fixed the sticky bearing issue and all lifters were able to smoothly push the bearing outwards.
I’m going to switch back to the Tubbs/carbine buffer in the mean time. The Armaspec has very minimal preload on the bolt due to the 2 spring system. At full extension, the secondary spring is providing the preload on the BCG. It takes about #4.5 pounds of pressure for the BCG to start moving backwards. It was probably enough preload to push the BCG into battery when it was clean (I hadn’t cleaned it until after todays session). I’d have to get some spacers to add some preload. The Tubbs spring takes around #9.5 pounds before it starts moving.
So all in all, I learned some stuff about the BCG but nothing about how the lifters felt seeing as it was basically a single shot all day. The good news is that my ejector spring is still strong and has zero ejection issues with 650 rounds through it now.12/18/23
Shot around another 150 rounds yesterday evening. This time with the Tubbs/Carbine buffer and “P” lifter setup with Fiocchi 115 gr. Gun operated flawlessly and felt really good, this will be my preferred setup. Didn’t get a chance to swap lifter and compare them back to back. My buddies were impressed with how consistent the ejection pattern was. Over 800 rounds in without a single ejection issue to report.
12/23/23
Shot a little over 90 rounds today at a local mini match.
I short stroked it as well. This thing is flat. Like equally as flat if not more than the MPX PCC 16”, which is also a heavier gun I believe.
Zero issues once again. Solid ejection.
I let a M class/PCC USAF Shooting Team member try it out and was very impressed with how flat it was. He currently shoots a JP GMR-15 and had a MPX with all the go fast parts available. He said the JP-5 wasn’t wasnt a huge difference compared to his tuned GMR-15, but this MEAN Arms gun was super flat and he’s already looking at selling some stuff to pick up an upper. His words, not mine, also his ammo would not cycle my upper with the "P" lifter installed. We didn't have time switch lifters either. I've never shot a JP-5 or his GMR-15 so I cant comment.The best slow mo video I have focusing on the gun
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14 hours ago, Haywizzle said:
Thanks for clarifying and I'm damn glad it wasn't a crack!
How do you like the holosun comp compared to the SRO? I have gone from a C-more to RTS2 to to HS507x2 to Romeo3 Max myself between my CZ's and open 2011. I ditched the HS507x2 after buying a bull shadow with the Romeo 3 direct milled.
The Holosun is a good optic. If they cost the same, I’d still pick the SRO though.When comparing dot only, my 2.5 moa SRO on setting 8 is brighter than the dot only reticle on the 507 comp. The 507 on max would be equivalent to the SRO’s 7.5 setting. The extra brightness is useful when the background is extremely bright like with fresh snow on the ground and sunny with no clouds. The extra reticle options (particularly the 8 moa ring) on the 507 is nice and does help.
Putting both optics in a vice, the SRO also appears to have less parallax shift. I swap my S2 and PCC optic due to this. IMO, the parallax is less of an issue on a PCC because of the cheekweld.
The hood on the SRO is much thinner. It basically vanishes while it’s more noticeable on the 507.
The extended hood on the SRO is great on guns that have a LCI on the barrel hood such as the Prodigy. All the splatter is directed to the bottom of the hood so the lens stays spotless. Saves me from having to send the barrel out to get the LCI welded up.
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Nope. Must have been carbon, lint, or something.
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Check out the MEAN Arms bearing delayed upper.
Here’s mine
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Take a look at the MEAN Arms bearing delayed upper. It’s $1500 but, 90-95% as soft as the MPX with the default lifter. Works on 5.56 AR lowers with 0 modifications.
I picked one up recently and it’s been a blast.
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Posted · Edited by tt350z
Can’t beat a Big Dog Steel Carnivore for delivery time, rigidity, speed, fit, and security for a full body holster.
If you want to stick to Kydex, Hammer Armament makes excellent holsters with a reasonable lead time for a custom holster.