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When Noveske was making good stuff, they were over priced in my opinion. Now, their quality seems to have dropped, huge gas ports, etc. I wouldn't buy Noveske stuff at a deep discount.Quote:
Originally Posted by Cokie
I don't. I only have the RGP. I could only guess that it's .004-.005" larger than the RGP.Quote:
Originally Posted by Fluke
DD Mk18 gas port are a confirmed .070" now, just FYI.
Whoops, sorry... missed the FSP thing.
God bless them. The should do an FSB run. I know us FSB hard heads are in the minority.Quote:
Originally Posted by HD1911
Completely agree.Quote:
Originally Posted by markm
I may have missed it somewhere, but doesn’t LMT offer a Crane-spec’d Mk18 FSP bbl?
I'm a FSP lover too! Only one of my uppers doesn't have one.Quote:
Originally Posted by markm
I have two LMT 10.5" that have run very well for me. I have no idea what size the gas port is.
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They've changed the port size over the years. Used to be that LMT made them to CRANE spec.Quote:
Originally Posted by usmcvet
You can get a DD with a FSB...
https://danieldefense.com/10-3-5-56m...t-profile.html
The LMT was my other option, as a turnkey upper. There’s a few on gunbroker right now. I figured with the 16” Colt I get to shoot it as is while the stamp processes. Makes the wait go by..Quote:
Originally Posted by usmcvet
.076" is their standard 11.5" GP.Quote:
Originally Posted by Fluke
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ADCO didn't great job cutting an AR bbl down for me. I'd use them again. You'll be with out your gun for a while. Extra uppers are great to have. Why 10.5? My next several uppers have been BCM 11.5" I've had no issues with the LMT 10.5" guns but I read Paul's post on why he chooses 11.5" for fighting guns. I think it's a sticky here on M4C. I'd link it but haven't compl figured Taptalk out! I'll look for it.Quote:
Originally Posted by marco.g
Found one thread:
https://www.m4carbine.net/showthread...0-5-quot-upper
"Why doesn't BCM make a 10.5" upper?
ETA -
Q: Why BCM chose the 11.5" SBR over the 10.5"
I get this question a lot. It is a good one. When we spec our program we can build anything we would like, so we sat down and looked at the pros and cons.
First Statement: I know a good 10.5" SBR can run very well. I personally own a semi MK18 type and it runs great. No problems.
A: Dwell time.
Dwell time is the time that your gas operated weapon maintains pressure to continue the cycling of the weapon. It primarily exsists from the time the bullet passes the gas port in the barrel to the time the bullet exits the muzzle. When you pull the trigger and fire the weapon the movement of the bolt carrier group unlocks the bolt, extracts, and ejects the spent casing. Then it cocks the weapon, feeds, chambers the next round, and then locks again. One of the thing that can make SBRs finicky is the dwell time (or lack of).
The 11.5" carbine is approximately 4% longer weapon than its' 10.5" counterpart, but this extra inch gives the barrel a 40% increase in length for dwell time. IMHO, this is an excellent trade off. This additional dwell time (all other things being equal) will allow the carbine to be more forgiving to different ammo types, extremes in air temperature, weak or worn extractor springs, worn extractors, buffer weights, etc.
Last Statement: For those folks who have a 10.5" that works very well, I would reply; me too. (see first statement)
If I had to "go to war" with a AR15 Carbine, I would grab the BCM 11.5".
The BCM 11.5" Runs Like a Dream.
Hope this info helps,
Paul"
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