guruofhotrod

If I'm not mistaken, even the early AR10's had the "Armalite cut" versus the "DPMS cut" that resembles a scaled up AR15: Front receiver = DPMS cut, Rear receiver = Armalite cut - pic borrowed from KE Arm's post: http://forum.308ar.com/topic/6359-ke-arms-ar-10-80-lower-pre-order/

Worst case scenario, here in california it may come down to this style being our only option left for an "AR" http://troydefense.com/pumpactionrifle/

I was just gettin to that - Salt Works is about to release their new M6 upper/lower and SI Defense has their new 300 Win Mag out so, I guess we're gonna havta revise our descriptions/terminology to keep up with things - maybe start a new thread for suggestions and a vote?

It's a matter of the cut brother: http://s1229.photobucket.com/user/Rolex45/media/IMG_1632.jpg.html The one in the front is DPMS style, the back is Armalite style - the pic of the Mega on JSE's site looks like an Armalite cut - just sayin

Brownells has the Aero in stock for $185.00 http://www.brownells.com/rifle-parts/receiver-parts/receivers/lower-receivers/308-ar-m5-lower-receiver-prod71464.aspx You might give Salt Works a call and ask about mag compatibility - I like the looks of their stuff and, they are coming out with an M6 receiver set (larger frame than 308AR) that will accept 300 Win Mag and possibly 338 Lapua size calibers (the M5 is only listed as a set) https://www.saltworksrifles.com/SWR-M5-p/50001.htm I would expect that JD Machine would be a nice option (a little pricy though - they're VERY proud of their stuff!!) http://www.jdmachinetech.com/shop-jd/308-lower-receiver

Doesn't the Apex have a separate top rail that you could remove? From the pics it appears that the rail on the handguard it the higher of the two. Perhaps you could remove it and machine or have machined the amount of the mismatch from the bottom of the rail section so that when re-attached the top surface will match the rail on the upper.

So what's the story with his absence here? I hope he realizes he IS MISSED around here!

I think I'll pick one of these up soon! Looks like an improvement over a standard AR15/308 type trigger for a fair price. http://www.bravocompanymfg.com/pnt/index.php?utm_source=Bravo+Company+Master+List&utm_campaign=7081d625b9-PNT_Trigger01_05_2016&utm_medium=email&utm_term=0_2ed08c07a8-7081d625b9-107416705&mc_cid=7081d625b9&mc_eid=0db81313bb

My buddy has a Matrix based DPMS type 308 with an AIM BCG and a standard AR15 F/A and it works fine, no interference problems I've got a Matrix Based Rifle that is about 90% complete, I'll be bringing my upper to my local FFL in a couple weeks when I pick up a Springfield 1911 that I horsetraded for - He has a nice reasonably priced nitrided BCG that I want to check the F/A engagement on before I buy it - I'll post the results and a link to his website after I check it.

I'll Second that!!! Hopefully everyone's New Year is getting off to a great start!

What handuard/rail are you using - the matrix stuff that Chris Riedeman has is pretty darn light and the O.D. is smaller than many other models which would be a plus for many women and youngsters that have smaller hands. I haven't seen them on Chris' site But I'm sure he could get them: http://www.matrix-arms.com/product/lavi-15-5-handguard/ I think I recall you mentioning that you already have a pencil profile barrel so the only other thing would be a lightweight gasblock like the titanium SLR models or if that's not in the budget you may be able to find an adjustable aluminum gasblock (actually lighter than titanium but, I always worry about aluminum's thermal characteristics allowing it to expand more and faster than the barrel possibly resulting in it loosening and/or leaking when it gets hot. Same thing with an aluminum muzzle device - probably would have to be pinned.

This caught my attention, is this what you're considering? I'm not sure how well it works, I'd say it's worth looking into. http://slrrifleworks.com/index.php?route=product/product&path=57_103_104&product_id=393

Yea, I hope all is well with him and look forward to his return - his "colorful" personality adds greatly to the uniqueness of this group - wherever you are 98, Happy New Year!! As to the emoticons, all I see anymore is the written descriptions, what are you guys using now?

I think Jtallen83's barrel is a 16" w/ a rifle gas (2" less from the gas port to the end of the barrel than your 18" = less time for the gas to unlock the bolt and cycle the action. Your 18" barrel may not need quite that big of gas port to function properly since the greater distance from the gas port to the end of the barrel = more time to unlock the bolt and cycle the action - best to work your way up to the ideal port size.

In addition to the gas tube length as 392heminut and survivalshop mentioned, you may want to double check the length of the buffer and the relaxed length and coil count of the buffer spring. Will the bolt lock back manually on the blot catch?

That would likely be the chamber that Black Hole Weaponry uses, they refer to it as "308B" : http://blackholeweaponry.proboards.com/thread/850/308b-chamber

Merry Christmas Everyone!!!!

Glad you got that figured out - FYI, Odin Works has another way to measure 308 AR Upper Height: (It would be nice if they wouldn't use the term "AR-10" to describe a "LR 308" type upper)

Just got an email from midway - they have these bullets on sale for 39.99/250 = $0.16 ea http://www.midwayusa.com/product/120598/federal-bullets-762x51mm-nato-308-diameter-mk319-mod-0-sost-130-grain-open-tip-match-box-of-250-bulk-packaged?cm_mmc=pe_weekly-_-hotbuy-_-federal_bullets-_-20151220

Damn, I linked the same article that MikedaddyH referenced cept his link went to a search? oh well I did get a kick out of this part though - "A related factor was the physiology of Afghan Taliban and Iraqi insurgents. Usually malnourished, their torsos are only about 7.5-inches thick, while the older M855 projectile often penetrated, “up to 7 inches before beginning to yaw, and will already have exited the body before yaw or fragmentation occur.” According to published standards, the new cartridge is designed to yaw no more than 3 inches beyond the impact point, producing a temporary cavity diameter of 4 to 6 inches and minimum penetration depth of 12 inches, and to do that consistently."

Hmmm "green ammo" not to be confused with "green tip" this stuff has no lead in it. Looks like they began issuing it to our troops on mid 2010 - here's a great article from "American Rifleman" that was published in May/2014 http://www.americanrifleman.org/articles/2014/5/21/testing-the-army-s-m855a1-standard-ball-cartridge/

Interesting chart but, as some of the commenters on the linked story suggest the details are incorrect: Jason • 9 months ago PLEASE do further research on 308 vs 7.62 headspace. This is incorrect internet information presented as fact and sorry to say but the well done graphic here will only help to perpetuate the incorrect information. They are correct on #3 that military brass usually has thicker case walls than commercial, but their information headspace and pressure is wrong. There is a lot of incorrect information on the net about 308 and 7.62 and that was apparently their source of info. Consulting SAAMI and having researched industry standards, shows that they are comparing .308 Win GO headspace against 7.62 NATO NO-GO headspace. Bottom line the ammo is the same size, but the 7.62 NATO has a longer chamber NO-GO. The headspace ranges are overlapping . Also their pressure data is citing old CUP (copper crusher data commonly called PSI back in the day before they could actually measure PSI) for one and modern piezoelectric transducer actual PSI for the other. McThag • 9 months agoWelcome to August 2014... The max pressure for 7.62x51mm NATO is not 50,000 psi, it is 50,000 CUP. 50,000 CUP, in this case, is equivalent to 60,000 psi. Next, every weapon designed for NATO that fires 7.62x51mm NATO gets proofed with a 140% pressure charge. That's 84,000 psi and the gun must not break to be accepted. That's a pretty sizable safety margin. The 62,000 psi max pressure for SAAMI is intended to the the absolute limit with a 52,000 psi maximum average pressure. The differences in headspace has resulted in ruptured cases in some rare instances when .308 is fired in a NATO spec chamber. Another important difference between .308 and NATO is the leade. Mil guns tend to have longer leades and that tends to lower the actual chamber pressure in the gun. This is for reliability when the gun gets really hot. I guess the good news is with the ban on importing parts kits with intact barrels, most "7.62x51mm" battle rifles you'll encounter are actually going to have .308 chamber dimensions. Anecdotally, when was the last time you heard of someones battle rifle blowing up where it wasn't sketchy surplus ammo (which should nominally have been NATO spec to begin with) or a gross error on the reloading bench? If this was actually a real problem there'd be a lot more broken gun stories out there on the internet because every negative thing in the world gets a thread. DIR911911 . Zebra Dun • 9 months agoas I remember it's the opposite , 308 is higher pressure than 7.62 but 5.56 is higher than 223.

The only place I recall seeing Go, Nogo, and Field Gages for 7.62 NATO is here: http://www.tothtool.com/Gauges_c_11.html With some manufacturers offering hybrid chambers on their barrels and as Mikedaddy H explained, their being many different variations of "308 AR" chambers it would make sense to check headspace with the 7.62 NATO first then, if it won't headspace with those, try .308 Gages before returning components to their respective manufacturers for assistance. And mrraley's rule of thumb should be followed: "is that you can shoot .308 in a 7.62 NATO chamber... BUT you CAN NOT shoot 7.62 NATO in a .308 chamber."

Pretty Cool! A quick search came up with this: http://www.milsurps.com/showthread.php?t=32088 Also I agree that it's likely 7mm x 57mm

Of course the current administration has to hang a dark cloud over the idea: https://www.nraila.org/articles/20150515/obama-administration-opposes-cmp-handgun-sales One other thing I wasn't keeping in mind, Here in Kommiefornia we have this little deal called the "safe handgun roster" if it isn't on the list, you can't buy it unless it is a private party transfer or you are L/E - I'll have to run this by my FFL buddy