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  1. RedDawn

    FSB Help Please

    Here’s some pics from AR15 Barrels.com Hope that helps. If you use the 11.5” carbine gas F marked FSB on an A2 receiver I would lower the front post about 4 clicks below flush to start your battle sight zeroing in and you should be good to go.
  2. @bamashooter another thing about the AR pistol is when you shorten the barrel the gas blow back is more pronounced than it is with a longer barrel. So I’ll recommend another barrel Sionics RGP 11.5” and I’ve shot this a one and it’s accurate and cycle is sweet with VLTOR A5 reviver extension. I did a little research on barrels when I started my pistol build and this is what I found. .063-.078 is magic number when it comes to gas port diameter on pistol carbine. Now Faxon has a mid gas on 11.5 and a larger port to accommodate that. KAK Industries 11" bbl with carbine gas is .084 - .086" Mega Arms 10.5" bbl with carbine gas is .080" Green Mountain 10.5" bbl carbine gas is .087" Anderson 10.5" bbl carbine gas is .086" Ballistic Advantage 11.5" bbl carbine gas is .073" Ballistic Advantage 10.3" Hanson bbl carbine gas is .076" Ballistic Advantage 10.5" bbl carbine gas is .078" Aero Precision 10.5" bbl carbine gas .0785" Faxon 10.5" Gov't/Socom bbl with carbine gas is .080" Faxon 11.5" Big GUNNER bbl with mid-length gas is .110" LMT 10.5" bbl with carbine gas Crane spec'd at .070" PSA 10.5" bbl with carbine gas is .081" - .089" Integrity Arms 10.5" bbl with carbine gas is .085"
  3. Looks good only thing is I’d recommend a faster twist rate for a shorter barrel 1:7 under for 14.5” and less.
  4. There’s not much difference between them but for the elevation on rear sight to work properly at distance the milspec is .833 at the base for F marked FSB. Here’s a pic
  5. I bought a BA 11.5” 556 barrel on sale for I think $135. They will pin your block for you and that’s much better in my opinion. The reason I went with BA is a sub MOA guarantee on their barrels. Hard to beat that.
  6. First off flat top upper with removable carry handle will go with a front sight gas block marked F. If the front sight block is marked S it’s for fixed handle receivers.
  7. RedDawn

    224 Valkyrie Issue

    I would definitely use 6.8 SPC mags that’s the standard mag for the 224V. If he’s using something else it’s not feeding properly. Try that first. I had a 300BLK from RF and it shot flawlessly suppressed or not. If the problem persist move to buffer weight and spring then to reducing the gas at the block that’s how I usually start the process of elimination. Good luck.
  8. RedDawn

    Favorite Movie Quotes

  9. RedDawn

    Issues with my AR Pistol build

    I would check a couple things. Gas block alignment screws are tight and tube is clear of debris. Swap the H2 for a H1 or H0. So the last round bolt hold open works. Check gas rings. Insert bolt into carrier hold tail end turn upside down if it falls out replace the rings. Try a different bolt it could be the extractor springs in the bolt. Try a different BCG. I put together an 11.5 BA 556 with a Geissele super gas block and installed Vltor A5 H2 Pistol buffer kit. I have had no issues whatsoever with this set up. I also use a Toolecraft C158 BCG
  10. RedDawn

    BCG upgrade question

    If I was gonna upgrade or replace a bolt. I’d go with Toolecraft C158. They are solid BCGs and just a few dollars more than PSA
  11. Oh that’s gonna be sweet through any shooters rifle.
  12. RedDawn

    Truckstop Coffee SUCKS.......

    Just add ice GTG
  13. RedDawn

    6.5 Grendel questions

    I thought I'd chime in here. I built a 16" carbine 6.5G that runs fine on a milspec lower. I have plans on building a 12" carbine and another 18" rifle. I think the Grendel is the best of both worlds with great ballistics and in a lighter package. I learned quite a bit off another forum 65grendel There's a lot of info there and members that can answer any questions you may have. Hope that helps.