mrraley

Fixed it for ya...

Here are the few pictures that I took while I was there. This is the new gril that they just unloaded... just remember, you saw it here first... <laughs> [img width=810 height=454]http://i215.photobucket.com/albums/cc90/mrraley/firearms%20stuff/2012-05-09_17-05-45_584.jpg [img width=810 height=457]http://i215.photobucket.com/albums/cc90/mrraley/firearms%20stuff/2012-05-09_17-06-13_709.jpg [img width=810 height=454]http://i215.photobucket.com/albums/cc90/mrraley/firearms%20stuff/2012-05-09_17-10-26_413.jpg

And I was just in their shop on wednesday too... Sorry I wont bow down to them...

ArmaLite already did the 300 RSAUM before. Sorta like, been there done that type of thing...

It's a cool class, been there twice already.

My job seems pretty dull to some of these posted... 14 years U.S. ARMY Infantry, 3 years as private contractor in Afghanistan 7 years and currently at a firearms manufacture and instructor.

<lmao> I always have time for my fans... <laughs> So who's buying the beer?

I have the tactical two stage triggers in all my rifles and have had no problem with them. I have also adjusted them or tuned them to the way I like it too. As far as I know, ArmaLite is the only one that puts out a tech note on how to tune the their triggers also.

Thanks for that picture. I see the DPMS is bigger than a standard M15 bolt catch, but similar in design and the ArmaLite is just bigger period. And yes the ArmaLite firing pin does have a retarding spring on it. But I use a standard hammer spring in my rifle and have had no problem with it.

The DPMS bolt catch is smaller than the ArmaLite bolt catch and may not have the positive control in front of the bolt itself being that small. I am not 100% positive on this, but I think DPMS uses a standard M-15 bolt catch on all their rifles.

Here are a few concerns I have in red for clarification...

Glad that helped and hope it cleared things up for ya.

The difference between .308 and 7.62 is chamber size, slight pressure differences due to powder burn rates, not external case size. Both cases will have the same external dimensions while the .308 has a slightly higher pressure 60Kish vice 50-55 CUP psi for NATO**. NOTE: This is OPPOSITE from the 5.56/.223 rule of thumb. The NATO chambers have greater tolerances to help with reliable functioning of military ammo. The NATO chamber is ever so slightly longer at .013". This is significant in that for reloading purposes, 308 brass will stretch more in a military chamber upon firing, thereby reducing the life of the brass and possibly promoting case head separation. But that additional chamber length will allow a round to chamber in an incredibly dirty weapon, which is a requirement for military applications. Also be aware this is why mil NATO brass is thicker vice 308 commercial brass. You will also see this "thicker brass fact" posted about 5.56/.223 brass which is a fallacy. **As a side note the reason the pressure issue is confusing is becuase the military measured 7.62 NATO chamber pressure (PSI) via CUP (in the 40s) vice the normal commercial rating of PSI measured (now) with electronic means. You will see many cling to the 50-55K PSI figure for 7.62 Nato becuase that is what the old Army TMs have in them. Since there is no conversion for the CUP measurement to the newer electronic measured PSI, they are two different numbers i.e no direct comparison. Many people will assume the CUP PSI is the same as SAAMI/Commercial PSI. It is not. Commercial PSI is derived from the direct pressure in the chamber through electronic means (piezo transducer or strain gauges). CUP is a crush measurement of a copper slug that has been fired, again not the same test. That means any newer weapon will be able to fire 308 Commercial ammo as manfs would not let them out the door if they could not, due to liability. Don't believe me, run the numbers/powders in any internal ballistics calculator and they will all be close to the 60K mark. BTW the proof load for the 308 commercial is 75K PSI, so don't worry about the 60K. GO GAGE CHAMBER SPEC INFORMATION (TOLERANCES FOR GOOD-TO-GO CHAMBERS) •AR-10 NATO – 1.633-1.638 (stainless steel, chrome moly, and chrome lined barrels) " 308 Winchester (SAAMI) Headspace GO - 1.6300" NOGO - 1.6340" FIELD - 1.6380" 7.62 NATO (Military) Headspace GO - 1.6350" NOGO - 1.6405" FIELD - 1.6455" Note that the military chamber would fail a NO GO check with a SAAMI gauge, but pass a FIELD check using the proper military gauges.

This is what I usualy tell people in my classes... Let me start with this analogy for you... Would you purchase an expensive car and run cheap gas through it? If your answer is no, then why would you buy cheap ammunition for your rifle? As an armorer I tell and teach my students to avoid steel cased ammo for the following reasons... 1. Steel cased ammunition does not expand and contract like brass cased ammunition does. 2. Most steel cased ammunition is either lacquer coated or polymer coated. 3. Lacquer coated ammunition can have a tendency to become soft after repeated shooting and the chamber is warm. Allowing debris to be lodged between the coated casing and the chamber. Lodging the casing and causing a failure to extract. 4. A lot of the coatings are not properly measured. So some caotings are thicker than others making the dimentions larger which can create a stuck casing too. I hope this helps and answers your question.

Firearms chambered for 7.62 cartridges will fire all standardized U.S. military 7.62X51 mm cartridges and all factory loaded cartridges in .308 Winchester caliber, but a .308 chambered firearm will not fire 7.62 cartridges.

On one of the other boards that I am on has this same type of thing. For the MIL, they have guys send in a copy of their DD214 and ask them to black out the SSN. For the LE guys, they send in a copy of their creds. This way the boards are seperate. But it's a thought.... <dontknow>

Why don't you go with the clamp on front sight? http://www.armalite.com/ItemForm.aspx?item=EA5045&ReturnUrl=Categories.aspx?Category=b5d84597-3666-4326-89c9-15fac1afdf18 And the detachable carry handle... http://www.armalite.com/ItemForm.aspx?item=EA5050&ReturnUrl=Categories.aspx?Category=b5d84597-3666-4326-89c9-15fac1afdf18

I'll take 2 in XL.... <thumbsup>

found it... some good stuff in the first one to read too. Already found them on FaceBook and the web site should be up soon.

Like mentioned above, you might want to try a little heavier type of ammo. But it looks like you have enough room for cycle of operation. Even going through the ArmaLite manual, they recomend a minimum of 150gr because the 147gr are usually underpowered and wont cycle the action properly.

When manualy pulling the charging handle back to lock the bolt back, how much room is in front of the bolt itself when you push the bolt catch/stop in to hold it back?

Here is a quote directly from page 17 of the owners manual that I have on file...

the only things you will need is a standard rifle receiver extension tube, AR-10 (specific) buffer. Use the current buffer spring you already have.

Right there is your problem... You might want to go to ArmaLite's web site and down load the owners manual and take some time to framilurize yourself with it. ArmaLite rifles are known not to play nice with underpowered ammo. You may want to look at a minimum of 150 grain... but for that perticular rifle I would look more toward the 168 grain.

When time permits, I'll post pictures of it. It has almost the same design as the M15 LEC model with the step down barrel. Was a limited run back in 2006.