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  1. MSTN

    Lets see your 6 ARC build

    Where to begin?!? Here are a few over the last year or so.
  2. MSTN

    Do chrome lined barrels speed up?

    JB Bore Paste is 600 grit. I like it for chrome lined barrel prep and belt-fed barrels: KG-2 is 1200 grit. I prefer it for today's premium SS barrels.
  3. MSTN

    The AR15 Picture Thread

    New 16" 6mmARC with Proof carbon fiber barrel. Interesting custom Cerakote color ordered by the buyer. Looks brown in one light and green in another.
  4. MSTN

    Proof Carbon

    I'm happy to offer a data point you'll find interesting. I had the chance to borescope a Proof CF .223 Wylde 18" barrel in a rifle I built for a competitive shooter, with a well documented 5000 rounds through it. It exhibited just the slightest hint of throat erosion beginning at the leade...
  5. MSTN

    6mm Build Complete

    Very nice components - Radian Mod 1 and Proof SS - in your rifle. My thought - worth every penny you paid for it - Forget the $800 scope concept. I'd suggest you save up for a Nightforce NX8.
  6. MSTN

    18" 6 ARC vs. 18" 223

    New 18" Proof CF barrel. 1.8" for first five shot group at 100 yards. 0.8" for the second group. Under 0.5" for the third. This is so easy...
  7. MSTN

    Barrel Cleaning suggestions to minimize gas port erosion?

    Gas port erosion results from shooting - not cleaning - the gun. A bore guide is always a good idea, to eliminate throat wear resulting from repeated passes with a carbon impregnated cleaning rod. Don't expect much in the way of cleaning results using CLP. For serious barrel cleaning...
  8. MSTN

    The AR15 Picture Thread

    New 6mmARC with 18" Proof CF barrel just off a bipod broke MOA with second 5-shot group and half MOA with third.
  9. MSTN

    Where is 6arc going?

    I just finished yesterday a 6mm ARC rifle for a customer with 18" Proof CF barrel and Kahles K18i scope. The customer wanted it sighted in at 100 yards with Hornady 103 ELD-X. Off a bipod with a 75 YO wearing trifocals: Two shots to get on paper. The first five shot group was 1.5". The...
  10. MSTN

    Any have experience with V7 Weapons Systems AR10?

    A V Seven big block gun is a very safe bet. It's the top choice if you're going to be on foot for extended periods.
  11. MSTN

    SP10 Builders kit?? Where to find?

    I'm a long time (15 year) - but admittedly very small time - dealer with Seekins. I had to wait 9 months for my last order for SP10 Builder's Kits. They gave me a whopping 10% off. I guess I should consider myself fortunate I got anything. The SP10 Builder's Kit is not even listed as...
  12. MSTN

    308 AR10 Build Info/Picture Thread

    Very tasty Craddock Bartlein 22" Remington .260 barrel makes this Seekins SP10 Builder's Kit quite special. So do key components like JP FMOS bolt carrier group with Enhanced Bolt, SLR adjustable gas block, TriggerTech Diamond trigger breaking at 2.0 LB, and the right recoil system.
  13. MSTN

    The AR15 Picture Thread

    A very appealing 18" 6mm ARC with Proof CF barrel for a new customer. JP FMOS, SLR adjustable gas block, TriggerTech Diamond trigger set at 2.0 LB, and BCM MK2 recoil system make this one smooth running machine. Inbound for it are a Kahles K18i and an OSS Flow 762 Ti. I'll have to get more...
  14. MSTN

    Replacement bolt and firing pin for LaRue large frame

    The JP High Pressure bolt and firing pin will work just fine in the LaRue.
  15. MSTN

    General Purpose Battle Rifle: KAC SR-25 14.5" ACC vs 16" APC

    This is a seven year old attempt on my part to produce something along the lines the OP was attempting to create. The base rifle is an ounce or two over seven pounds. It will shoot sub-MOA 5-shot groups with match grade ammo. I can get 1.2 MOA out of MK319, the most devastating metal-on-meat...
  16. MSTN

    General Purpose Battle Rifle: KAC SR-25 14.5" ACC vs 16" APC

    The weight (especially out front) of what you propose is pretty daunting. I'd instead consider a custom 16" Proof carbon fiber wrapped .308 big block gasser weighing in at around seven pounds, saving you something like 1.5 LB in just the basic weapon. I really like your scope, tactical light...
  17. MSTN

    JP bolt assembly in different carrier?

    I used dozens of JP Enhanced .223 bolts with (now discontinued) Young Manufacturing National Match bolt carriers for several years with excellent results.
  18. MSTN

    Gas port size matters??

    Gas ring...
  19. MSTN

    DLC on BCG's ..pro's v. con's ?

    "IME, IonBond is very difficult to deal with." Agreed...
  20. MSTN

    DLC on BCG's ..pro's v. con's ?

    Cost and lead time are the big factors. Ionbond DLC is even more important on the bolt! JP has been DLC coating their bolts for several years now. How about a muzzle device used with a suppressor? It is super helpful. This component gets the nastiest carbon exposure on the whole gun...
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