survivalshop

I wouldn't think they would install the 30mm on a majority of them , too expensive to maintain & operate . I can see some set up that way ,but not most . Besides , with this commie admin. , they would not give them up , the extra barrel will be given or sold to his buddies in the middle east , any extra's would be de-milled . That would be like a Apache on wheels , pretty badass when you think about it.

Anything under warranty , you should send back , get a return shipping label from them & send it in to have them go over it . It may not just be a Port alignment issue , let them give you a rifle back that should function flawlessly right out of the box .

Hogue , but I couldn't find one for a 308AR on their sight , but there is this thread https://forum.308ar.com/topic/12951-hogue-ff-forends-any-good/ Also Fulton Armory http://www.fulton-armory.com/far-308-handguards.aspx

Nice , I like the MOE Stock also .

Them dogs know an ambush when they see it .

http://www.45raptor.com/45RAPTOR/wp-content/uploads/2014/04/45-Raptor-Minimum-Velocities-Ballistic-Chart.pdf Doesn't say what barrel length they used for testing .

I'm all for someone having another Upper in another Caliber for the platform , be it a small frame or large frame AR , but carrying another Upper Receiver with you hunting , just is not logical or make any sense . If you are hunting in your back yard , I can see it , but trucking hill or dale , well ............................................. There is no caliber , including the M2 50 cal. that is a good shoot through brush caliber , they all are deflected going through even light brush , it doesn't take much to destabilize a spinning projectile , its been proven over & over again .

Ok all you guys/gal's have good products worth trying , but how many of you have taken a Barrel Nut off after it had been on for over twenty years , using one of these products ? Yes I have & the Nut came off just as easy as if I had put it on the day before & the product was Mil Spec grease , so I can say with out a doubt , it worked for an extended period of time . Just saying .

Ammo type makes no difference , except for the possibility of the 308 having a higher CUP max.per SAMMI spec's , doesn't mean it does . 308 & 7.62x51 ammo are the same size dimensionally , chambers are the difference & not much at that . I have been shooting both in both chambers for forty years with out an issue .

147 gr. Ball ,FMJ didn't feed ? Do you mean they would not feed & chamber or they would fire & not cycle the action to feed the next round from the mag ? I don't believe its a Mag. issue also , but as has been said , try the DPMS Metal Mag . just for the fun of it . Take a bright flash light or something & look into the Chamber & see how the chamber walls look like , your looking for any kind of roughness or rings on the walls . Can you take a photo of the spent brass , side walls ? Most Ranges do not allow you to disassemble a firearm on the line or during no fire times when checking /changing Targets .

Good start .

Not sure of their Chrome lined , because I use nothing but Stainless , Criterion are top notch to me .

Same BCG , maybe same type , your betting they Head Space the same ? Why even carry a half rifle , its not about weight , the 308 will do anything you need , so why bother with another caliber , your not gaining anything . I'd be more inclined to carry other things I would need , more ammo , food , water , shelter , communications , etc.

JP 's has a 17.25" http://www.jprifles.com/1.4.4_hg_mkiii.php

Don't need to build another one to upgrade one or two you have & if there is a market for it , I see no reason they will not make a set up for a 308AR.

I will soon have the ALG Defense Forged MilSpec Receiver Extension & a STD Extruded MilSpec Extension to compare , I ordered both today from Brownells .http://www.brownells.com/rifle-parts/receiver-parts/buffer-tube-parts/buffer-tubes/ar-15-m16-buffer-tubes-true-mil-spec-black-prod84490.aspx This is the other one , http://www.brownells.com/rifle-parts/receiver-parts/buffer-tube-parts/buffer-tubes/ar-15-m16-mil-spec-buffer-tube-prod27440.aspx?avs|Style_1=Mil-Spec

Join the crowd

So far , its not letting me use that code, I'm going to keep trying . YOU HAVE TO INTO CHECK OUT TO USE IT . I just did .

Code LBN, to get free shipping .

Another way to chose the right Bullet . HORNADY ANNOUNCES 4DOF TRAJECTORY CALCULATOr Hornady has announced the launch of the new Hornady 4DOF (Four Degrees of Freedom) Ballistic Calculator. The Hornady 4DOF calculator provides trajectory solutions based on projectile Drag Coefficient (not ballistic coefficient) along with the exact physical modelling of the projectile and its mass and aerodynamic properties. Additionally, it is the first publicly available program that will correctly calculate the vertical shift a bullet experiences as it encounters a crosswind—referred to as aerodynamic jump. According to the company, the use of drag coefficients, correct projectile dynamics, aerodynamic jump and spin drift enable the Hornady 4DOF ballistic calculator to be the most accurate commercially available trajectory program available, even at extreme ranges. The Hornady 4DOF Ballistic Calculator is available free at: www.hornady.com/4dof. ( hot link ) http://www.hornady.com/ballistics-resource/4dof “Current ballistic calculators provide 3 degrees of freedom in their approach; windage, elevation and range, but treat the projectile as an inanimate lump flying through the air,” said Dave Emary, Hornady Chief Ballistician. “This program incorporates the projectile’s movement in the standard 3 degrees but also adds its movement about its center of gravity and subsequent angle relative to its line of flight, which is the 4th degree of freedom.” Using Doppler radar, Hornady engineers have calculated exact drag versus velocity curves for each bullet in the 4DOF calculator library. Combined with the physical attributes of the projectiles, the 4DOF calculator is simply more accurate for long-range hits than using BC based systems or custom drag curves based off of limited data collection points. “This calculator doesn’t utilize BC’s (Ballistic Coefficients) like other calculators,” added Jayden Quinlan, Hornady Ballistics Engineer. “Why compare the flight of your bullet to a standard G1 or G7 projectile when you can use your own projectile as the standard?”

This is interesting as the first one . THROAT EROSION, PART II AUGUST 19, 2016 MIDSOUTH SHOOTERS 1 COMMENT The following is a specially-adapted excerpt from the forthcoming book “Top Grade Ammo” by Zediker Publishing. BuyZedikerBooks.com for more. by Glen Zediker We talked about rifle barrel throat erosion last time, in descriptive terms. Short course: It’s the area just ahead of the case neck area in a rifle chamber that bears the majority of the “flame cutting” effect of burning propellant gases. The wear in this area determines the accurate life of a barrel. The greatest detractor from accuracy is the roughness that results from the deteriorating steel surface. Of course, the throat is advancing, getting longer, at the same time. After time, the “jump” or gap the bullet has to leap before engaging the lands plays its part in poor on-target performance. I’ve always followed a “scheduled” replacement plan on barrels, determined, of course, after much experimentation and many measurements. That’s for competition rifles. For others, I have a more-or-less “shoot it until it doesn’t shoot well” approach. If you chronograph frequently enough, and are using the same load, you’ll see velocities drop as more rounds go through the barrel. This is because of the lengthening throat: more room for expanding gases, lower pressure, lower velocity. I know a few who gauge barrel replacements based around chronograph readings, and the resultant propellant charge adjustment necessary to maintain “new barrel” bullet speed. The general consensus, for a round with approximately .308 Win. case capacity, is 2.0gr. So when it takes another 2 grains of propellant to restore original velocity, that one’s done. Here are a few more ideas on barrel life, and also a few thoughts on how to keep a barrel shooting better longer. Last time I made a statement that I should have qualified more, but space is always such a concern in these articles. It was respecting the idea of pulling a barrel, cutting some off its chamber-end, and then rechambering it. This overwrites the eroded area, well most of it. That can only be done for a bolt-action rifle. I said that worked well for chromemoly barrels but not for stainless steel barrels, and the difference is in the “machine-ability” of the steels. It is possible to set back a stainless barrel, but it’s tough to have a “chatterless” cut result. A little more usually needs to be removed to get good results with stainless, and this, of course, is making the barrel overall that much shorter. Certainly: you have to plan on a set-back at original barrel installation, and that means include enough extra length to compromise. Usually it takes a minimum of 1 inch to get a worthwhile result with chromemoly. So what can reduce the effects or severity of erosion, which is only to say prolong the life of the barrel? Reasonable does of propellant behind lighter-weight bullets, that’s one. Another is that flat-base bullets do result in less cutting than boat-tails. Flat-base bullets “obturate” more quickly. Obturate means to “block,” but here it means to close a hole, which is a barrel bore, which means to seal it. The angled tail on a conventional boat-tails creates a sort of “nozzle” effect, directing gases to the steel surface. Can’t much be done about that, though, because when we need boat-tails we need them. However! A relatively obscure but well-proven boat-tail design does increase barrel life, and also tends to shoot better though a worn throat. A “rebated” boat-tail has a 90-degree step down from the bullet shank (body) to the tail. It steps down before the boat-tail taper is formed. These obturate fully and quickly. It is common for competitive .308 shooters to switch from the popular Sierra 190gr MatchKing to a Lapua 185 rebated boat-tail when accuracy starts to fall off due to throat wear. Sure enough, the Lapua brings it back for a couple hundred more rounds. Some propellants burn lower temperatures than others. Some double-based propellants claim this, and, true, if you can be happy with the performance of one, it can extend barrel life a few hundred extra rounds. WW 748 is one of those propellants and my experience with it is that the claims are true. It’s not night-and-day, but there’s a difference. Research to find others. Coated bullets don’t have any influence on throat erosion, but they tend to perform better though a rough throat. Boron-nitride is the only bullet coating I can recommend. I use it. Do an extra-good job cleaning the throat area in a wearing barrel. Copper and other residues tend to collect more as the steel gets rougher and rougher.

Oh , dooooo!

We all know they are all in it together , the only way they will man up is with a rifle barrel up their a$$ .

As far as the plastics go , I like Pmags & have no issues with them , but Lancer's are on the top of my mag list there . Metal , the original C-Product Mags are top notch, actually made of Stainless Steel & believe it or not , DPMS mags , I have no issues with them . Thing about 308AR mag's is , sooner or later you will find a rifle or Lower Receiver that will not like one or another , as most know here , my early CMMG Lower Receiver didn't like the first Gen. LR Pmags , but worked fine with any Steel & the Gen 3 Mags . Magpul made changes to the Gen.3 & that made a difference . By the way , who is this 98 guy ?