survivalshop

It locked down good enough to unscrew the YH hand guard when they swiveled it & it wasn't locked down yet ! <dontknow> I have a YH made Hand Guard ( made for Fulton Armory ) on my 20" 308AR & until I loc tite'd the HandGuard threads & its cinch nut , it would loosen every time I went to the range . Some anti rotating pins would help . I believe that slim rail sticking out will break with rough use . Not that any of us would abuse our rifles or there add on's . <thumbsup>

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Not sure if it being a Doppler Radar would make a difference in placement .

I really don't think the gas port in the barrel is a different spec. , I think its all about the many different manufacturers making 308 Upper receivers out there . It is nice to get that kind of info from a manufacturer. <thumbsup>

Cartridge dimensions are the same ( US made ammo ), its the chambers that are a little different , with the 7.62 x 51 having a slightly longer lead to rifling & a small difference in shoulder to neck angle dimensions . All to make the chamber for a battle rifle to be a little looser for battle field conditions & NATO ammo variances . What's the Difference between .308 Winchester & 7.62x51mm NATO? by Clint McKee and Walt Kuleck dumb question i alway thought these 2 ammos where interchangeable but some have told me otherwise whats the story??? jim

Or the bolt is not unlocking . Worn Barrel extension ? Could be the Upper receivers cam channel is out of spec.. I would be reluctant to fire this rifle until you figure it out . Take measurements & compare them with a known working system or new components . - Cam pin dimensions & fitment in Carrier - Upper Receivers cam channel -I would remove the Barrel to get a better look at the Barrels Extension & check head space with the barrel & bolt only .

If the windage adj. is not working is one thing , but looking down the sights & saying they are not aligned is another . Photo's would be a big help , please .

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<thumbsup> Odd that you are able to do something like that , wonder if RCBS is aware of this possibility .

I pretty much have a Manual for any of the bullet manufacturers I use . They are good reference , these Bullet Manufacturers do a lot of R&D with their Bullets . Something I can not say about other's Manuals . You can join an online reloaders forum & get plenty of info , but you have to take individuals loading practices with a grain of salt , so too speak.

I have seen broken springs for the Extractor or Ejector cause problems you are describing . As was said, the gas block may also be suspect. The magazines can also cause this kind of issue , try a different brand of Mag., ya never know .

Yes , that is what I meant to say . Ambi Bolt release is shown in your photo & was was the dummy latch you made . My bad for not proof checking my post . I originally thought you were talking about something on the trigger system its self , but looking at your photo it was clear it was the Bolt release . Ambi. Bolt release lever probably works with out a problem with the FCG it was designed around .

He brought a rock to a gun fight & lost , of course . I always say this about these short clips of shootings , we only see a small portion of what really happened . I like the idiot walking across the street toward the gun fire , taking cover would have been prudent .

Board track & all that sand , wow , had to be a loose track . I like the way they were smacking the winner up side the head & all of them laughing .

That 24 " barrel should have a rifle length gas tube & because you are mating a DPMS Upper on a POF Lower , they were never made to be mated & there may be a Gas Tube length issue . No way of knowing until you assemble the rifle & & test it . If the length of the gas tube is too short , you can use an Armalite rifle length Gas tube which is longer . Any AR 15/16 rifle length gas tube should work or the longer AR 10 rifle length Gas tube . Fulton Armory sells what they call a 308 gas tube & I believe its just an AR 10 gas tube . We have had some builds here that use different manufacturers Upper & Lowers mated & some need a different Rifle length gas tube & thats where the AR 10 Gas Tube comes in . AR 10 is the designation for the Armalite brand of 308AR , your not building an Armalite rifle , although we know what you mean , but keeping the designations correct helps in part or component identification . From Criterion Barrels ; -Josh

I still use my Bushnell Bore sighter on some rifles , but mostly I shoot at 25 yards & make adj. there .

Well , that's not right . In post # 3 , you said you had it all the way to the left & looked like it needed to go more , sounds like it moved at one point . Has Magpul contacted you back yet ? Have you shot this rifle yet with these sights ? Have you the ability to take photo's of the sight alignment & sights . You also say its all straight , with the upper receiver rail perfectly aligned with the gas Block rail ? It will not take the Gas Block being off to screw up sight alignment . The rail on the Gas block may be out of spec's , even though its rail flat may be level , other parts of where the rail clamps, may be off & tilting the front or rear sight .

I have never trimmed pistol brass . I use Unique & Bullseye Powders for 9mm & 45 acp, but there are other good powders out there , the problem is , finding the ones you like , in stock . IMR 4064 works with .223,308 & I use a pulldown MilSpec Powder , a ball powder , WC 846 for .223 & 308 ammo , very good powder . If your 9mmm can shoot HP bullets , try some in the varying weights . I'm loading 147 gr. FMJHP 's from Magtec & they shoot pretty good . 115 gr. works well of course . .223 , I like 55 gr. FMJ's & 62 gr. FMJ's ,the ones with out the penetrator , they seem to shoot well in any twist rate . I also use 52gr. SMK's ,55 gr. SMK's , 69gr. SMK's , 62 gr. Barnes TTSX . The Barnes shoot really well , but pricey for practice .

Check your Ejector & Extractor for proper movement & any Burr's that can cause them to hang up . If the action fired three rounds with out a problem & the mag held the BCG back on last round , sounds like the Buffer & spring are functioning properly . Now after that , something happened some where . Running her wet ? Check components for anything out of the ordinary . Broken spring(s) , Gas block loose or moved , Carrier Key loose or not sealed , things like that .

Oh , the Ambi. ​safety Bolt release is interfering with the operation of the FCG . & you made a "Dummy " lever ( Plug ) , Ok <thumbsup> At least thats what I get out of your statement . <dontknow>

Ya' all got me confused <dontknow>

What brand is your Lower Receiver ? Any more , even with AR 15 's , I like to keep the Upper & Lower receivers the same manufacturer or matched set if buying them together .

That's cold , but <lmao>

I think you broke it on purpose , just to get a new Hand Guard ! <laughs>

Didn't they just have a recall on them .