Zak Smith Posted March 27, 2004 Share Posted March 27, 2004 The Fedex man just dropped off my 6.8SPC upper. MSTN built this for me and Wes has been great. Modified Bolt: [ link to larger image ] [ link to larger image ] Troy sights: [ link to larger image ] It is, really: [ link to larger image ] [ link to larger image ] [ link to larger image ] Full index: http://apollo.demigod.org/~zak/DigiCam/6.8mm/ Details: 18" stainless barrel, chambered by PRI. OPSINC 4-port brake K-G coated black. Handguard is PRI. I believe the upper receiver is LMT. Bolt is custom machined. Bolt carrier is JP. -z Link to comment Share on other sites More sharing options...
warpspeed Posted March 27, 2004 Share Posted March 27, 2004 I hate you guys that like in the real USA Almost makes me want to move. Zak - range report is order , don't ya think? Link to comment Share on other sites More sharing options...
Zak Smith Posted March 27, 2004 Author Share Posted March 27, 2004 Got out today and had time to shoot about 20 rounds. Recoil is comparable to 5.56. The gun ran perfectly. 5.56 mags do not work well, holding only 5-8 rounds. A replacement mag body plan is in the works. The ammo I have is pre-production, which I bought as a source for once-fired brass. Because of the prototypical nature of that ammo batch, it is not accurate. Handloads using the 110gr VMAX or 115gr Hornady should be sub MOA easy. Powders of comparable speed to 2230 are reputed to work well. My custom dies should arrive in about 2-3 weeks. -z Link to comment Share on other sites More sharing options...
Patrick Sweeney Posted March 27, 2004 Share Posted March 27, 2004 Custom dies from where? Is the extractor a standard, or modified also? Link to comment Share on other sites More sharing options...
Zak Smith Posted March 27, 2004 Author Share Posted March 27, 2004 Dies from the Hornady custom shop. It looks like the extractor is modifed. -z Link to comment Share on other sites More sharing options...
TMC Posted March 27, 2004 Share Posted March 27, 2004 You said the 5.56 mags only hold 5-8? Do they single stack in the mag? They don't look much larger in dia. than the 223. I haven't been following the rifle major threads so if its been covered forgive me, does it make major? Link to comment Share on other sites More sharing options...
Zak Smith Posted March 28, 2004 Author Share Posted March 28, 2004 No, they do not go single stack. The 6.8 rounds are wider towards the shoulder than the 5.56 rounds. 5.56 mags have deeper ribs on the forward end, and I think this conflicts with the wider shoulder. After about 6-8 rounds, it gets hard to seat the next on in the mag. Yes, 115gr bullets make major (320PF) , but barely. 120gr bullets with a short ogive would be easier to make major with. -z Link to comment Share on other sites More sharing options...
ErikW Posted March 28, 2004 Share Posted March 28, 2004 (edited) Get thee to a chronograph and report post haste. Try Thermolds. They are supposed to work better for larger rounds. Even if 6.8 does make new Major, nobody is going to use with only 8 round mag capacity. It'll take a long time for any special military magazines to trickle down to us peons. How about 7.62x39 mags? Edited March 28, 2004 by Erik Warren Link to comment Share on other sites More sharing options...
Zak Smith Posted March 28, 2004 Author Share Posted March 28, 2004 No-go on the Thermolds. I tried Orlites, USGI 30's, and Colt 20's. Even if 6.8 does make new Major, nobody is going to use with only 8 round mag capacity. It'll take a long time for any special military magazines to trickle down to us peons. Cynical grouchiness aside... PRI will be releasing replacement mag bodies for 5.56 that just happen to work very well holding 28 rounds of 6.8. http://www.ar15.com/forums/topic.html?b=3&...t=184872&page=1 Just like you buy mag conversion kits from Armalite for your AR10, or replacement mag bodies for your S_I, so will this deal work. Enjoy. -z Link to comment Share on other sites More sharing options...
TMC Posted March 28, 2004 Share Posted March 28, 2004 Maybe I should call JP and have him hold off on the new upper I ordered last week? Shooting major on an AR15 platform would be cool. Link to comment Share on other sites More sharing options...
Zak Smith Posted March 28, 2004 Author Share Posted March 28, 2004 The one I got has more of the "Tactical" features and less of the 3Gun features. A 20" CTR-02 shooting Major 6.8SPC would be awesome. -z Link to comment Share on other sites More sharing options...
EricW Posted March 28, 2004 Share Posted March 28, 2004 Zak, Where'd you get the groovy adjustable stock? Link to comment Share on other sites More sharing options...
Zak Smith Posted March 28, 2004 Author Share Posted March 28, 2004 EricW, The stock is the Magpul M93A made by Magpul http://www.magpul.com It's a telescoping stock that is rock-solid and has better features than the regular CAR-type telestocks. It can be had special-order in a post-ban compliant version - you pick what length you want it fixed at. Rich, the owner of Magpul, is just down the highway from me. He builds good stuff and is a good guy to do business with. -z Link to comment Share on other sites More sharing options...
TMC Posted March 30, 2004 Share Posted March 30, 2004 For those who want to know, Model 1 Sales (love em or hate em) has compete 6.8 uppers for $440 including bolt for a 20" 1-9.5, they also have 24" SS bull barrels for $265 with the gas block. I was told they have all the parts ready they are only waiting for commercially available ammo to release them, should be Early next month. Link to comment Share on other sites More sharing options...
diehli Posted April 10, 2004 Share Posted April 10, 2004 Hey Zak, what do those Troy sights and that handguard run? What gas block are you running underneath? Link to comment Share on other sites More sharing options...
rhino Posted April 10, 2004 Share Posted April 10, 2004 I like the handguard ... Do you have to remove it to attach pieces of rail, or are the holes threaded so you can just bolt stuff on there when you feel like it? Link to comment Share on other sites More sharing options...
Zak Smith Posted April 10, 2004 Author Share Posted April 10, 2004 Hey Zak, what do those Troy sights and that handguard run? What gas block are you running underneath? The Troy sights are $120m each for front and rear. The rear only has the large aperture. The handguard is the GenIII from PRI, which goes for around $320. The gas block is a stainless low-profile from PRI, about $50. Looks just like this but in ss: Do you have to remove it to attach pieces of rail, or are the holes threaded so you can just bolt stuff on there when you feel like it? The holes are not threaded. They use a "backer" similar to how the JP rails connect to the JP handguard. The ones in front are possible to remove and replace without removing the tube, the rear ones probably not. The barrel nut does not have to be removed to remove the tube - it connects just like an Armalite float tube. -z Link to comment Share on other sites More sharing options...
Religious Shooter Posted April 12, 2004 Share Posted April 12, 2004 Zak, Don't you have a JP upper/rifle? How does the OPS brake compare to the JP tank brake or Cooley brake (whichever one you have)? Link to comment Share on other sites More sharing options...
Zak Smith Posted April 12, 2004 Author Share Posted April 12, 2004 RS- I was interested in the same thing and did a side-by-side comparision of the OPSINC 4-port brake vs. the JP BC Comp. The review is here: http://www.thehighroad.org/showthread.php?...SINC#post878021 Short answer: the JP BC Comp has it all over the OPSINC brake. Link to comment Share on other sites More sharing options...
uscbigdawg Posted May 21, 2004 Share Posted May 21, 2004 Zak, I checked out a SPC upper from Model 1. After a little bit of time, how do you like yours? Too, what's the word on mags, brass, accuracy, etc.? Rich Link to comment Share on other sites More sharing options...
Zak Smith Posted May 21, 2004 Author Share Posted May 21, 2004 6.8SPC FAQ: http://apollo.demigod.org/~zak/firearms/6.8SPC/faq.php The upper runs fine. I've got a set of dies form the Hornady custom shop, and about 400 rounds, so I'm experimenting with load data at this time. The "new" manufacture Remington ammo is supposedly quite accurate - 8" @ 600 yards. I only have some of the old preproduction stuff (not accurate due to powder contamination) and my handloads. N135 is real accurate, but not fast. -z Link to comment Share on other sites More sharing options...
uscbigdawg Posted May 21, 2004 Share Posted May 21, 2004 Dude, You rule on response time! When you get the load worked out, you'll have to let us know how the gun runs under rapid fire conditions (i.e. 3-Gun type scenario). Any trouble making major PF? What's your barrel twist? Oh, do you have a website for MSTN or PRI? Thanks, Rich Link to comment Share on other sites More sharing options...
Religious Shooter Posted May 22, 2004 Share Posted May 22, 2004 Rich, Did you physically see the Model 1 stuff? http://mstn.biz/ http://www.pri-mounts.com/ Link to comment Share on other sites More sharing options...
EricW Posted May 22, 2004 Share Posted May 22, 2004 What's the scoop on mags? Can USGI mags be re-worked, or does everyone just have to wait until Sept. 14 to buy new mags? Link to comment Share on other sites More sharing options...
TMC Posted May 22, 2004 Share Posted May 22, 2004 The Pri-mounts place noted above by Religious Shooter says they have custom AR mags. That may be a source. Link to comment Share on other sites More sharing options...
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