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  1. Constructor

    What AR trigger is best for hard 7.62x39 primers?

    It easier to shorten the tail of the bolt.
  2. Constructor

    Best 12.5 barrel?

    Are you saying you think every barrel in the country should be made to the same specs before they can be compared? Please tell me you have some really good shit, you are baked and posting.
  3. Constructor

    Quality Junk Rifle... Kinda

    On the part of the consumer it's called ignorance.
  4. Constructor

    What's the better M80?

    IME it seems like IMI ammo and IMI rifles were made for each other. The ammo is accurate in their rifles but not so great in others. I mean it makes sense them using their rifles to test. S&B ammo seems to be more accurate in the rifles I shoot or have shot, M1A, PTR 91, AR10s built using the...
  5. Constructor

    Quality Junk Rifle... Kinda

    Keep in mind some business owners woke up one morning and said "we're going to make and sell the cheapest POS products and the people of America are going to buy them, and we will get rich because people don't know what they don't know"
  6. Constructor

    Best 12.5 barrel?

    Is velocity important? https://www.itstactical.com/warcom/ammunition/military-ammunition-failures-and-solutions/ a small portion of that report- "The disturbing failure of 5.56 mm to consistently offer adequate incapacitation has been known for nearly 15 years. Dr. Fackler’s seminal work at...
  7. Constructor

    Best 12.5 barrel?

    Frank seems to think every barrel on the market should use the same chamber, same bore area, same diameter land to land and groove to groove. That's like saying every VW should use the same specs as every Corvette. I say it's up to the people making the barrels to design and make the best they...
  8. Constructor

    Best 12.5 barrel?

    All barrels aren't the same and they never will be. You have your design and everyone else has theirs. I don't think Eric would be too keen on letting out trade secrets. I'm fine knowing I can take a BCM, BA, Criterion and Colt and the ARP barrels and shoot all of them through the same chrono...
  9. Constructor

    What AR trigger is best for hard 7.62x39 primers?

    Geissele or really any trigger that isn't a cassette/enclosed drop in. I tried a few and went back to Geissele.
  10. Constructor

    Best 12.5 barrel?

    The barrels are button rifled and no build up called out, after a good cleaning the bore black is almost transparent. The barrels are on the market, have been since 2008 and they have always been faster than the other barrels on the market. Apples to apples? They are AR barrels being sold on the...
  11. Constructor

    12.5" Pistol/SBR caliber choices

    Old thread but...Only problem with 7 twist or enfield (square) rifling is you leave velocity on the table. The 16" 5R and 3R barrels are capable of pushing 110gr bullets to 2750fps loaded with H335. The 12.5s(really 13") will go to 2650 and that is as fast as a 16" Wilson or Bison. Barrels with...
  12. Constructor

    Best 12.5 barrel?

    Blackstone Arms sells ARP 5R and 3R 4150 11595-E Nitride treated mid gas barrels that run 60-90fps faster than most, that makes them 30-60fps faster than most 14.5" barrels including the BCMs, also more accurate. He'll have lightweight 14.5s in a month or two. IMI M193 ammo- BCM 14.5 ave...
  13. Constructor

    BCM less expensive than Daniel Defense

    Wilson Combats barrels use to be made by ER Shaw, Bill himself posted that on a forum years ago. They have a different maker now or could be making them in house but they are all stainless, not CHF. When Shaw made them they had good 11 degree crowns, now they have gone back to a 45 degree...
  14. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    Wilson isn't the top tier company many think it is.
  15. Constructor

    Bear Creek Arsenal barrels

    Agree with most, I have heard to many horror stories involving BCA barrels. Why take a chance when there are a lot of decent barrels and some really good brands? Blackstone Arms is selling 12.5" 5R and 3R barrels that are 40-60 fps faster than BCMs CHF 14.5" barrels.
  16. Constructor

    12.5 criterion core chrono results

    I have seen 5R and 3R barrels produce 60-90fps faster velocities than enfield rifling but I haven't seen or air gauged a Criterion barrel other than some 6.5 barrels 8 years ago..
  17. Constructor

    AR trigger

    That happens a lot even in 3 gun. Guys coming from shooting bolt guns think AR triggers should break with no creep buy the wrong enclosed drop in triggers . I tried some Rise triggers that were said to have been made for 3 gun, they will double and triple and sometimes catch at half way, then...
  18. Constructor

    To ARC or not to ARC...

    Target or varmint gun, the ARC is probably the best thing going now. I wouldn't choose it for anything else.
  19. Constructor

    6Arc AR not making sense

    I would check velocity against another chrono, lab radar etc. I had one that consistently read 100fps fast.
  20. Constructor

    AR-15 headspace issue criterion barrel

    I'd shoot it. I had to pressure test the 6.8 barrels we made. The proof ammo I had Hornady make came in at 94,000 psi. Never once came close to breaking a bolt or blowing a barrel, the fired cases look pretty bad though. If the ammo fits in the chamber but chamber is a touch on the small size...
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