User Panel
User Panel
User Panel
|
Posted: 7/23/2004 12:11:23 PM EDT
[#1]
Yeap. Afraid so. |
|
|
|
|
Posted: 7/23/2004 1:57:36 PM EDT
[#2]
OK, how is it different? The projectile is the same, so I'm guessing NATO spec is different in velocity.
|
|
|
|
Posted: 7/26/2004 1:58:36 PM EDT
[#3]
|
|
|
|
Posted: 7/26/2004 2:17:56 PM EDT
[#4]
Grant, For those of us lacking the brain power, could you please explain how the bolt is designed "around" the M855? How is a bolt tuned or designed for a specific bullet and how does it know what type of bullet it's firing? If the ammo is loaded up to spec and it has enough power to properly cycle the BC what factor does the bullet's weight play? I'm not trying to be a smart ass  , I'm just genuinely interested on a scientific explanation on how this is done... |
|
|
|
|
Posted: 7/26/2004 3:36:26 PM EDT
[#5]
Scientific answer from me??? You will be waiting awhile my friend. I believe that it has to do with the higher pressure levels found in the mil-spec ammo. I also think that XM193 will work well (does fine in my one AR). To be very honest, I think with a break in period, proper cleaning and mil-spec ammo the enhanced bolt will work just fine. I know for a fact that Denny (GTS), SMGLEE (CL Tactical) and myself are running enahnced bolts with out a single issue.... C4 |
||
|
|
|
Posted: 7/26/2004 3:46:03 PM EDT
[#6]
Nothing to do with pressure. Pressure is constant, bolt thrust maybe????
HFG |
|
|
|
Posted: 7/26/2004 3:59:38 PM EDT
[#7]
I think it is pressure.
SAMMI pressures are lower than NATO |
|
|
|
Posted: 7/26/2004 4:49:09 PM EDT
[#8]
I'm calling Bullsh%t. I find it impossible to believe that the military would go along with parts that would only work reliably with one specific load.
Edited to add that if this was, by some stretch of the imagination, factual, it would be incredibly short-sighted thinking. |
|
|
|
Posted: 7/26/2004 4:53:56 PM EDT
[#9]
To be VERY honest, I am just repeating what LMT has told me... C4 |
|
|
|
|
Posted: 7/26/2004 4:54:11 PM EDT
[#10]
....you're not running the enhanced carrier like you sold me are you?  IMI Q3131a is pretty hot ammo... The 600rd "break-in" was using XM193 -- Lot 12. More than 900rds was shot using XM193. Then I switched to Q3131a since some uppers can be "ammo sensitive". My upper is/was failing with both Q3131a and XM193. BTW, at Blackwater I believe Marc had me use XM193 using his lower and it failed. |
|||
|
|
|
Posted: 7/26/2004 4:57:04 PM EDT
[#11]
I really don't believe that they are lieing to me, but believe that it is possible for the military to specify that they won't something built around a certain gr weight (seeing it currenlty with another company I stock)... C4 |
|
|
|
|
Posted: 7/26/2004 4:58:38 PM EDT
[#12]
Grant, don't misunderstand, I'm not doubting you. |
||
|
|
|
Posted: 7/26/2004 5:57:26 PM EDT
[#13]
I know your not. I have no interest in selling anyone something doesn't work. The problem is that the enhanced bolt works great for me a several other people I know. I also know that SHIVAN is very knowledgeable about his gear and is doing everything right (cleaning, quality ammo, etc). The only thing I can say is to try some M855. That is what they will be using at the LMT to test your enhanced bolt.... C4 |
|||
|
|
|
Posted: 7/26/2004 10:53:21 PM EDT
[#14]
One more bad LMT thing to add to the list. Lately I have been hearing many.
|
|
|
|
Posted: 8/2/2004 10:13:05 AM EDT
[#15]
Precisely what I didn't want to hear back from LMT:
It's good and bad in a way. If the bolt and carrier combo work as advertised with M855 then someone who uses that exclusively will be getting a good deal on a nice bolt and carrier combo.... Hmph...... |
|
|
|
|
Posted: 8/2/2004 10:29:21 AM EDT
[#16]
No comment...  
|
||
|
|
|
Posted: 8/2/2004 10:31:24 AM EDT
[#17]
Yeah, I really don't have one either but though an update would be good. 
|
|||
|
|
|
Posted: 8/2/2004 10:57:39 AM EDT
[#18]
Shivan, I know I mentioned it earlier, but I am using the enhanced bolt with the LMT standard carrier in my LMT M4 upper WITH 55gr Q3131A. I was just at the range this past weekend and put another 300 rounds through it with absolute zero malfunctions of any sort. I have about 600 rounds through it now total.
What does this mean....., I have no idea......
|
|
|
|
Posted: 8/2/2004 11:02:30 AM EDT
[#19]
I hate all of you with working LMT gear......hate you I say.
If they don't get it to fail I will try one or two more "scenarios". I am going to get a Colt carrier and M855 ammo and see how it does with several iterations of that combo. If it runs for me with M855 then I will sell a very well made piece of LMT gear for anyone using M855. I really do like the bolt design and finish. |
|
|
|
Posted: 8/2/2004 11:03:30 AM EDT
[#20]
Well, I was planning on buying an LMT M4 upper assembly. Should I? I have heard numerous problems with the "Enhanced Bolt." Should I just stick with Bushmaster?
All these LMT problems makes me wonder about their quality and reliability. |
|
|
|
Posted: 8/2/2004 11:07:21 AM EDT
[#21]
Even though I am having these problems -- the 10.3" LMT M16 upper is still on my short list. I would recommend them, but my experience tells me to stick with conventional bolt and carrier designs. They work without question. |
|
|
|
|
Posted: 8/2/2004 12:11:31 PM EDT
[#22]
He is not having an issue with his upper, but his enhanced bolt and carrier... C4 |
|
|
|
|
Posted: 8/2/2004 12:14:31 PM EDT
[#23]
As far as I can tell......it is something about the combination of the three parts: LMT E-Bolt, E-Carrier and M4 upper that doesn't like me. It could be ammo selection. If that is the case, the bolt and carrier go on the market. No big deal, no sweat. Live and learn. |
||
|
|
|
Posted: 8/2/2004 5:58:05 PM EDT
[#24]
I shot my LMT upper w/ enhanced bolt and carrier group for the first time the other day.
I only put about 100 rds thru it, but I was pretty impressed to have 0 malfunctions of any kind in a brand new upper. THe one issue I do have is that it took 8 clicks to the left to zero the sights (using LMT BUIS). Most people I've heard from have said they have about the same amount of clicks using LMT BUIS.... and not all LMT uppers... I dunno if the BUIS has anything to do with that, or if the FSB is slightly canted. Its not that big of a deal tho because the irons arent gonna be my primary sights, the Aimpoint I'm ordering soon will. |
|
|
|
Posted: 8/2/2004 6:42:04 PM EDT
[#25]
Just been following along, seriously thinking about an LMT upper, was actually a day or so away from buying. After quite a few problems with LMT that I've read about...this and the misaligned M4 ramps, I went with a good deal on a colt upper. I really hope these issues get worked out, would still like to get one, just can't figure out why a lot of companies let some of these things slip by. Good luck, you've been very patient.
|
|
|
|
Posted: 8/3/2004 4:39:43 PM EDT
[#26]
I am adding a poll to see what folks think I should do....
|
|
|
|
Posted: 8/3/2004 4:43:21 PM EDT
[#27]
POLL ADDED
|
|
|
|
Posted: 8/3/2004 7:20:53 PM EDT
[#28]
Interesting output on the poll so far.....
|
|
|
|
Posted: 8/3/2004 7:30:16 PM EDT
[#29]
Colt Innards.
|
|
|
|
Posted: 8/13/2004 7:37:51 AM EDT
[#30]
OK, upper is on it's way back. No details as yet what was found.
I will update as soon as I know. |
|
|
|
Posted: 8/18/2004 4:38:59 PM EDT
[#31]
Upper is back with me. Chip stated that they updated the extractor springs in the bolt.
On the ticket that came back it states: "Enhanced Bolt Repaired Replaced" The first thing I noticed on checking the upper on a lower, the upper cycles back and forth MUCH easier. There is no binding, no hint of the tightness that existed pre-RGA. Now, remember this upper had had thousands of rounds through it so it should have been well broken in prior to it's trip -- but it is now a lot smoother feeling. I am pleased so far......but since this is a rifle and not a flower vase the real test will come Sunday when I hit the range for some function testing. Wish me luck.........
|
|
|
|
Posted: 8/18/2004 5:03:34 PM EDT
[#32]
Its your upper and money. I just want to see the results.
|
|
|
|
Posted: 8/18/2004 5:17:39 PM EDT
[#33]
I sure hope those problems are a thing of the past for you Ed. Let us know how she does on Sunday.
|
|
|
|
Posted: 8/18/2004 6:59:42 PM EDT
[#34]
I'm just your basic Armchair Commando, so my opinion doen't count much to anyone but me. Having said that, I for one would be hard pressed to pay out good money for an "enhanced" product that was so ammunition sensitive that it only worked with one type of ammo. Also I cannot believe the military would find that an acceptable situation in a combat weapon.
In short, I'm not buying the "ammo excuse." An "enhanced" part that will not function as reliably as a "stock" part is useless in my Armchair Command Humble Opinion. I'll wait and see what the final verdict is though. However I'm betting on QC being the trouble.  Lonny |
|
|
|
Posted: 8/21/2004 6:09:46 AM EDT
[#35]
i'm in the same boat with shivan, got my enhanced bolt back from chip.
got 400rds cycled through it so far. last time it fte around 1.5krds. meat |
|
|
|
Posted: 8/23/2004 5:48:39 PM EDT
[#36]
Shivan, did you get to the range yesterday? Any updates?
|
|
|
|
Posted: 8/23/2004 5:52:54 PM EDT
[#37]
No......got trumped on weekend activities. I am going to try and make it some time this weekend. |
|
|
|
|
Posted: 8/24/2004 9:17:20 AM EDT
[#38]
tag, to see range report
|
|
|
|
Posted: 8/31/2004 7:32:08 PM EDT
[#39]
Tag for range report and to say that my Colt and Bushmasters all run with no malfunctions, ever, with anything, except some crappy Malaysian and S&B ammo in the M4gery. I would like an LMT upper and lower, but I'm not paying $100 more for an upper, $100 more for a lower, and $100 more for a complete "enhanced" bolt and carrier that still may have bugs to be worked out. Looks like LMT may be moving too fast to get product out there and hitting alot of bumps in the road. They better slow down or they'll be in a ditch. LMT will get it right, or get smoked by their competition, Colt, Bushmaster, and RRA. Ain't America great!
|
|
|
|
Posted: 8/31/2004 7:57:28 PM EDT
[#40]
If I were you and it comes back still not 100% I'd give it to long-rifle-tactical to figure out. BTW an H buffer used with the LMT carrier might be slowing its cyclic rate down too much. I run a PRI fat boy gas tube on a 14.5" Bushy and if I use a LMT H buffer with it sometimes it will short cycle. Q3131a and XM193 will run 100% but sometimes AE 223 won't and Natec doesn't work at all.
Personally I think the problems with your LMT are in the carrier and bolt. While a neat design I think its far from 'proven' and needs more development. I'd go with a RRA 'enhanced' bolt group with a Wolff extra power extractor spring and a McFarland 1pc gas ring and for good measure I'd install a new CAR gas tube and run an H buffer (which you are). I would polish the chamber and make sure that the barrel extension is perfectly aligning with the reciever feed ramp, if not the receivers ramps could be in the way of the barrel extensions ramp and be causing the feeding problems. Also make sure your mag catch is adjusted correctly, the threaded part of the catch should be flush with the button. |
|
|
|
Posted: 9/1/2004 1:26:03 PM EDT
[#41]
Ed,
Gotm4 covered all the bases for correcting any issue that this upper has, if you do not find it in 100% working order when tested for serviceability. Get a refund for it and I will build you an upper and I guarantee it to work with any standard .223 ammo. |
|
|
|
Posted: 9/12/2004 3:09:04 PM EDT
[#42]
How'd did it function at the range?
|
|
|
|
Posted: 9/12/2004 3:24:44 PM EDT
[#43]
In 120 rounds during the Virginia Black Rifle Day 3-gun match it had one doublefeed caused by a STOUT mag insertion by me. Two rounds later a bad round logded itself in the chamber....
At this point it seems to function. I have been super busy and have not had time to do a complete test as I did before. I will try to get a full battery of tests in soon. |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
