Yep, you're right. I forgot about that tidbit. Thanks for reminding me!
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my records show that the Brownells nitride 308 BCG's I bought in late 2019 had the HP firing pin. At that time, their NiBo 308 BCG's were not HP firing pin. I think a few years later, don't know when, the NiBo BCG's also started to have the HP firing pin, not sure bout that, though.
the nitride 308 BCG's used to be about $130 back then.
Another very successful build based on the superb Seekins SP10 Builder's Kit, Proof 6.5CM 22" carbon fiber barrel, TriggerTech Diamond Trigger, and JP FMOS Bolt Carrier Group. Right at 9 LB empty. Who needs a 13 LB bolt gun???
Thank you for posting the deets on these, and thank you for your service.
what does it weight dry? i have a roam upper receiver, but that's the only part from that company. i've got a 20" 308win (no suppressor) w/ 5x optic that weighs 5# 12.3ozs (minus optic 5# 4.1oz)
Just over 6 lbs. I think it was 3oz over with the muzzle device attached.
Oh no. As shown it’s 8.5 lbs unloaded. Suppressor with xeno adapter is less than a pound. Optic+mount is 1.5 lbs.
I've since sold the 45 Raptor barrel and assembled another .308 Win rifle to replace it. This one is very similar to my .243 Win with a 24" X-caliber barrel but with a rifle+2 gas system and Magpul UBR stock.Thank you for posting the deets on these, and thank you for your service.
i have a 243win w/22" and standard rifle length gas and need tuning badly (haven't had time yet). i guess with the x-cal the gas port is .100"? unless you had them custom size it?
It was my first X-caliber barrel in an LR build. I had them drill it to their recommended port size but it was undersized and didn't cycle reliably. I think I drilled it to a #38 drill bit - .1015"
I've found that there are too many variables with the LR platform to get the gas port sized correctly from the vendor. Best to either have them drill it for an adjustable gas block from the start or size it smaller for you to drill out incrementally to find the best size for your application and combination of parts.
I drilled out all of my gas ports for use with an AGB - I generally use SLR AGBs except one build when I used a RifleSpeed AGB on a friend's rifle that he intended to run suppressed some of the time. I use a combination of heavy(er) buffer weight (9oz), lighter buffer spring, and adjustable gas to tune. The lighter buffer spring sounds contrary to thinking but I don't want the bolt slamming so hard into lockup. The trick with the LR platform is tuning it to operate and cycle reliably while reducing both the felt recoil and loading impulses in order to keep your sights on target. I think that I have found the combination of components and tuning to give me that. I generally run hotter loads that beat up my brass and am happy with the additional milli-seconds of bolt lockup the +2" gas tube length gives me with the 24" barrelled LR308. I plan to do the same when I re-barrel the .243 Win.
I've built and tuned several LRs. Most recently, I helped my brother get through some timing issues with his LR308 build last year. He insisted on using a standard non-adjustable gas block and was having issues with cycling from the start. We incrementally opened his gas port (I think it was .0935") and then fine-tuned it with some added tungsten weights to his rifle-length buffer. Worked like a charm and is a very nice shooter.
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Looking to set up my current night rifle with a new barrel for PRS/Gas Gun Matches. Unfortunately.243 with 1-10 twist barrel isn’t ideal
i've got excellent results. 22" 8t rifle length gas shoots factory hornady match 123sst and a-max 1 hole @ 100 yards. only issue is it's overgassed and requires much tuning.
Why is your mount backwards?
He’s saying your mount should be flipped so that the “long arm” of the mount is toward the front, not the back as it is now.
Can’t remember if these Mega uppers are one piece or not. Obviously the idea of an offset (long arm) mount is to avoid spanning the upper/handguard junction.
it just fits/mounts the way i need it to be for eye relief and chargehandle room. in most cases it's usually mounted opposite. being a south paw it works better for me. whether it uses nuts or latches it goes on trigger finger side.
POF Rogue. 10'ish pounds with optic, suppressor, and bipod.
Just OK so far. Started with Igmann 147's and tried Norma 168's.
Had a few FTF's and quite a few FTE's. I assume because of the can. Even tried a few different buffers.
Bolt doesn't go home with authority like it should. Had odd wear marks at 2 spots in the upper receiver. Will keep messing with it.
Accuracy is unknown. It's a bit harder to shoot a lightweight semi auto accurately and I was getting tired and sloppily shooting towards the end.
It's DI. Some special run of this rifle that is not listed on their site.
Not sure why. They are $1200'ish. Model: POF02322
Not sure why. They are $1200'ish. Model: POF02322
https://www.brownells.com/gun-parts...oups/308ar-bolt-carrier-groups/?sku=078102004
they don't list HP firing pin in the specs, but all the ones i've ordered, nitride, have had the HP FP, and of course, the smaller hole in the bolt face. It's mentioned a couple of times in the review comments, and the "Customer Questions" section.
The HP FP is not interchangeable with a regular 308 FP, probably to prevent folks from using the skinnier HP FP in the too-big 308 bolt-face hole. Obviously, the fatter 308 FP won't fit in the smaller HP FP hole.
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Depending on bolt brand listed as "hp" the firing pin might not fit regardless of questions and reviews. I'll have to check part number to be sure as I've ordered hp pins from there. If you want a for sure hp pin that'll fit a hp bolt, get 1 from kak.
Anybody got a Faxon Match Series Barrel LR-308 6.5 Creedmoor? If so can you post a pic of your barrel face/chamber? I just got one and it will not feed anything. It just jams the bullet into the face of the barrel and drives the bullet deeper into the case. (See pic) I have 3 other 6.5cm barrels and they all have a chamfered chamber to aid in feeding the round. This Faxon barrel does not and I’m just wondering if that is by design or if mine is defective.
Thanks in advance.
Thanks in advance.
This is a pic of a Wilson Combat barrel to show the chamfer it has in comparison to the Faxon barrel. It feeds everything.
I have a Faxon 6.5CM, fluted match 24", but I had that problem only with certain ammo, probably an ogive thing. Unfortunately, it was the ammo I had the most of. eventually removed the barrel, got one of those rubberized (cratex?) abrasive cones, and tried my best to improve the lower part of the bevel at the entrance to the chamber, not too much, and polished afterwards. Also, took one of my metal mags and tweaked the mag feed lips a little so that the cartridge would have a better angle up the feed ramp to get to the feed cone, instead of the barrel face. So I ended up with a dedicated metal mag that worked reliably with that ammo.
Then I assembled another upper with a different brand barrel, no problems. So I don't shoot the Faxon anymore. But I did get it to where it works.
I'm half-tempted to remove the barrel extension so I can get better access to improve the feed cone, but, meh, got better things to do, and then you have to futz with the timing and clocking, gas port, headspace, shims, when you reassemble, probably not worth it.
Pics below are before the cratex rework. Pics below were the initial assembly. But they show the stock Faxon 6.5CM feed cone. Probably same as yours.
Then I assembled another upper with a different brand barrel, no problems. So I don't shoot the Faxon anymore. But I did get it to where it works.
I'm half-tempted to remove the barrel extension so I can get better access to improve the feed cone, but, meh, got better things to do, and then you have to futz with the timing and clocking, gas port, headspace, shims, when you reassemble, probably not worth it.
Pics below are before the cratex rework. Pics below were the initial assembly. But they show the stock Faxon 6.5CM feed cone. Probably same as yours.
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looks like the left lug near the feedramp is chipped? what ammo are you using, mags and receivers? more firearm info awaiting
so that kinda soured me on Faxon for 6.5CM. But their 308 barrels for me run like a sewing machine, all ammo, all mag types, several barrels (7 of them in 308). Just their large-frame 6.5CM barrels ... loss of confidence.
Ammo: Hornady 140s ELDM, HPBT and 143 ELDM, 147 ELDX; S&B 140 HPBT & SP; Berger Hybrid, Federal 140 HPBT and couple other I can’t recall.
Mags: Magpul 5 & 10 rnd, CMMG metal, AR stoner metal, Amend2 poly & a couple other metal mags that I can’t remember brand.
Aero upper/lower receiver set, JP BCG and HP firing pin, JP silent capture spring, SA adjustable bleed-off gas block.
I have 2 other AR-10 rifles in 308 and have interchanged parts (BCG, buffer springs, bolts, mags, everything I can think of that could have an effect in this. No joy. My wilson combat 6.5cm barrel runs anything I throw at it and the only difference I can visually see is the Wilson Combat has more chamfer at the chamber mouth but it is heavy and I wanted a lighter barrel.
IDK. It’s going back to Faxon. I also have had good experiences with Faxon. This is why I posed the question here to see if anyone else has had this problem.
I did consider swapping the WC barrel extension with the Faxon but pretty sure if I did that they wouldn’t take it back. Plus I’ve never tried to remove the pin from an AR barrel extension either. Probably bugger that up pretty good on the first go around if I tried.
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An issue you'll have when changing the extension is headspace with gas port at 12. Might get lucky on that? I use some of the same you do, but have only used factory Hornady 123a-max match ans 123sst..
At what direction is the brass ejecting? I state this as it'll let me know if the bcg is dragging or gas block is out if alignment/not centered above port. I'm trying to keep up with this thread and another person in another forum with the same cartridge (different barrel brand). What's the gas length?
Ejecting about 3 o’clock. Rifle length.
Everything seems to be running smooth with no abnormal signs other than it won’t feed. It won’t feed from a mag on initial load not just after firing and ejection. It only functions as a single feed.
It's a faxon issue then. ALL AR's should feed, but shooting/accuracy is another issue. Not ALL extensions are made for the same platform that use different cartridges just like feed ramps in a bolt gun (rum and wm are different). The Faxon is have is well overgassed as an agb barely chokes it enough to cycle correctly.
Send it back
The only factory ammo my faxon heavy match 308 doesn’t like is the hornady stuff. It loves the federal stuff. Is really unfortunate because I was really interested in the 168 ELDM load.
Same problem I had.... Faxon is stupid and they dont understand how things work.
I went back and fourth w/ Faxon , they sent me 3 different barrels because machining was so bad, finally got a decent one, and then noticed your same problem... the things are junk and wont work. I asked Faxon about it and they acted like a 5 year old, dumb and clueless then ghosted me. The whole no taper on the breach made the bullet tips ram into it and stop. I made a video on it. Thankfully even though several months later the place I got it agreed w/ me and exchanged it or a different brand. I didnt use that one, but got a Blackhole Weaponry barrel and all problems solved and works flawlessly.
