PursuitSS
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Posts posted by PursuitSS
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I'm interested in trying this for a couple of reasons,
1.- To ease cleaning, the NP3 finish will be easier to clean AND I should be able to tell IF it's totally clean
2.- Yes, it's 100% reliable, but anything else that helps reliability is icing on the cake
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I'm running a J.P. Enterprises LMOS carrier (QPQ Finish) with a Wolff +10% action spring. I know about the theory that the wider rails on the LMOS Carrier slow the carrier velocity down. Currently my carbine is 100% on reliability with both M-193 ammo and Hornaday TAP Urban 40 gr.
Here is my question,
IF I were to have Robar plate the inside of my upper receiver with NP3, any chance it would cause problems due to a increased carrier speed? I would think that due to a reduction in drag that the carrier speed would increase greatly.
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They are a solution looking for a problem IMHO. The old wives tale about malfunctions caused by gas rings lining up is nonsense unless your gun is very marginally gassed.
BIG +1
Colt teaches in their Armorers class that their AR-15's will run on just ONE gas ring.
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It really comes down to suitability to purpose. Recreation, hunting, competition, precision, etc. This is true with every type of gun made.
A rifle that is great for 3-gun may be exactly the wrong thing for hunting. A good tactical rifle is going to suck for long range shooting. Etc.
I'm not sure I would have gotten a Colt .308 mainly because I really have no use for one. And I can kick your ass at 1000yds with my bolt action .308. But if we were hiking through the woods with our guns, I'd be in real trouble because mine probably weighs twice what yours does.
i don't think I'd make that claim against some of the 6.5 Grendels out there.
I'm more of a "tactical shooter" than 3-gun, I think 3-gun shooters aren't as familiar with some of the "bottom feeder" manufacturers out there such as Hesse / Vulcan / Blackthorne. Some (most) of their products are JUNK.
When you purchase a Colt, you get a rifle LESS likely to break or malfunction than many of the other companies out there.
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One other advantage to the Mid-Length gas system is an increase in bolt longevity, the figures I've seen quoted indicate double the life before a failure.
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My understanding is that mil spec fcg parts are surface hardened only, so any serious polishing or "gunsmithing" will break through the case hardening and parts will wear much faster than if no work was done. Best to replace all three parts with either mil spec or a match system of your choice.
Mark
BIG +1 There have been several posts on AR15.com about this problem. Yes, they are surface hardened ONLY! There have been several posts on people having there trigger "go south" after a Bill Springfield "trigger job". Usually occurs after a few thousand cycles. In some cases it goes full auto. (Hide your dog)
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This is another reason to avoid grease in DI ARs. I have had a few on my bench brought to me that don't run. When I get them apart I see this sludge like stuff and every time the user has thought grease would be better then lube. The problem is the suspended crap in the grease that either turns to an abrasive compound or turns to sticky sludge. A little grease on the cam pin track is ok but all else I recommend a quality oil. Piston guns may get away with grease as there is less exhaust in the bCG area but I still use lube.
I currently use Slip EWL but just picked up a quart of Mobil 1 5w30 that was on sale. I can tell you I like the price better already. I haven't tried mobil1 but I know a lot of guys use it on their rifles and pistols with no issues. Mobil 1 also doesn't appear to have some of the bad detergents that other brands do but that's just based of initial Internet research. I'm not a chemist so don't take that for fact. If anyone has done some research or has any experience with the motor oil I'm open to learn. If you think about the basics, metal on metal, cylinder objects etc motor oil makes sense. I just don't want to find extractor o ring eaten away etc.
I also have ran Slip EWL and I'm currently using Mobil 1 0w40, if you read up on engine oils, the 0w40 will run in lower temps without getting "thicker" and will also work and protect better in higher temps.
Got it at Autozone.
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Pat Rogers believes in running them "wet", please click and read the tale of "Filthy 14"
http://www.slip2000.com/blog/s-w-a-t-magazine-filthy-14/
The last round count I could find was a YEAR ago and was over 50,000 rounds!
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something u did?
No, photos of the late, lamented Progressive Machine & Tool Titanium AR-15 bolt carrier
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Sorry for the BAD photos, if I would shoot like I take pics I couldn't hit a barn while inside it.
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Is that Smith Enterprises aluminum carrier a new product? I couldn't find it on their web site.
No, it's around 25 years old.
How many rounds do you have on that 25y old Al carrier?
Probably no more than 1,000 rounds. What gets torn up on the Aluminum carriers is the area where the hammer rides as the carrier cycles.
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Is that Smith Enterprises aluminum carrier a new product? I couldn't find it on their web site.
No, it's around 25 years old.
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I don't know.
I'm guessing thats the older JP Aluminum BCG. Any idea what the newer SS low mass BCG that they offer weighs in at? I've been running the Young Manufacturing Super Light BCG, I wonder what that comes in at as well.
The photos are labeled as to manufacturer. The Aluminum is a Smith Enterprises, the weight of the J.P. Enterprises QPQ Stainless carrier is 6.3 ounces, the newer units weigh 6.85 ounces.
Cool thanks. So that's an older SS JP carrier, and the newer SS ones are a shade heavier. Didn't they make an Aluminum one also? I'm guessing that one's even lighter.
They did offer an Aluminum carrier several years ago.
IIRC, the weight was close to the Smith Enterprise Aluminum carrier.
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What did they sell for new? How many were made does anyone know?
Thanks
Retail was $347.00 + shipping
Reportedly Jerry Miculek had/has one in his 3 gun AR-15.
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I don't know.
I'm guessing thats the older JP Aluminum BCG. Any idea what the newer SS low mass BCG that they offer weighs in at? I've been running the Young Manufacturing Super Light BCG, I wonder what that comes in at as well.
The photos are labeled as to manufacturer. The Aluminum is a Smith Enterprises, the weight of the J.P. Enterprises QPQ Stainless carrier is 6.3 ounces, the newer units weigh 6.85 ounces.
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Sounds like I already have what I'm looking for.
Thanks!
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I had one, you say you saw an ad where one was marked sold for $500.00? If it was over at AR15.com, yep, that's what I got for it!
I didn't run very many rounds through mine, I know it was well made! I wish they were still available.
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Does anyone know if anyone is offering (or going to offer) an Aluminum or Titanium bolt carrier again?
I've owned both a Smith Enterprises Aluminum carrier and a Progressive Machine & Tool Titanium carrier in the past.
I'm currently running a J.P. Enterprises LMOS Carrier
Progressive Machine & Tool Titanium Carrier
Smith Enterprises Aluminum Carrier
J.P. Enterprises LMOS Carrier
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Has anyone had "trigger time" with both units?
I currently run a Timney 3# trigger, but I've heard that by design the AR Gold is a safer unit (against a dropped firearm)
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Hi, I'm new to this forum, I post quite a bit over on AR15.com.
Yes, I have a strange screen name. It came from using my 1996 Impala SS as a patrol car and I tend to get in WAY too many pursuits.
Thoughts on AR-15 Bolt Carrier velocity
in Rifle - Technical
Posted
I think I have to agree, I'm worried that it might create a problem. I don't like being a guinea pig.