Page 3 of 3 FirstFirst 123
Results 21 to 24 of 24

Thread: Recommendations on an 11.5 build

  1. #21
    Join Date
    Jan 2015
    Posts
    528
    Feedback Score
    0
    Quote Originally Posted by Eurodriver View Post
    Plus ce change, plus c'est le meme chose.

    Your thread was what finally cemented the need to act on my SBR dreams. Over the holiday sales, I was eyeing that Sionics blem lower, thinking 'I really should just buy that, transfer it as a pistol, then build a shorty to SBR + suppressor host over time...' Delay and hesitation cost a man in this life, but I am patient.

    After giving myself a crash course on gas ports, buffer systems, buffer weights, springs, and carriers, the overall answer appears to be the Sionics 11.5 with the Crane spec gas port mounted on an A5 lower (ie the Sionics lower... it's almost like these guys know what the hell they are doing, right?) with an LMT e-carrier helping even more. Given that your 11.3 with a sub .060 gas port was able to cycle, if not strip or lock open on lower pressure ammo unsuppressed, plus the anecdotal evidence and company testing from the Sioincs thread, all indicate that the .070 gas port is about the happiest medium between a reliable unsuppressed platform and a can-host as one can have without having to go into the contrivance of a switchblock. Which makes sense, given the origin of the specification: military SBRs that need to work with Mk262 and other full pressure NATO loads regardless of their condition.

    As far as the KAC side of the business goes, I can understand the turn-key nature of it all. However, a Sionics upper + a lower of my choice kitted out with whatever grip/stock plus some BUIS still comes in cheaper/matching the price of the KAC upper alone, much less a full rifle. Further, I'll be building this as a pistol to start, then filing for the tax stamps. I am a lowly civil servant, and make actual dogshit for pay, which I then have to try and sell on the open canine fecal market (it's a real bear right now, I tell ya, that market). So, I have a real interest in spreading out the development costs of this project.

    Thanks for the help and guidance thus far. This place is a treasure trove of good advice, experience, and knowledge.
    Last edited by noonesshowmonkey; 01-10-17 at 16:37. Reason: details, spelling

  2. #22
    Join Date
    Aug 2011
    Posts
    2,162
    Feedback Score
    4 (100%)
    Get a 12.5".

  3. #23
    Join Date
    Sep 2013
    Posts
    942
    Feedback Score
    0
    Quote Originally Posted by Defaultmp3 View Post
    FWIW, I just finished my third, and probably last, AR-15. It has an 11.5" Centurion Arms barrel, Vltor MUR upper receiver, 10.75" Hodge Wedge Lock handguard, V Seven Extreme Environment gas tube, and SLR GB7 Micro Pin gas block.

    I was able to get it to consistently lock back on empty unsuppressed shooting PMC Bronze .223 while using a BRT CustomTune Gas Port Insert size 0.063", while using it with an LMT full auto e-BCG, Vltor A5H2, and Sprinco Green spring (cryo treated). Gas blowback with a Surefire SOCOM556-RC was not particularly noticeable when used in conjunction with an AXTS Freedom Bone, shooting Winchester Western W3131 5.56 NATO.

    I would have liked to use an adjustable gas block, but none of my preferred choices would fit the Wedge Lock (MicroMOA or SLR), so I went with the gas port insert instead. Time will tell how it does.
    regarding the Ecarrier,

    I have a 10.8 barrel with 069 gas port that was getting failure to lock back with PMC bronze when dirty unsuppressed. Taking out the green spring and putting the regular vltor/bcm helped but not completely. Then I took out the Ecarrier + bcm bolt and put in the sionics np3 bcg and the issue was solved. Somehow in my small port sbr the Ecarrier wouldn't completely function when the (np3) standard would. I started with A5H4 and would get function but no lock back occasionally , then went to A5H3, then to A5H1

    So the Ecarrier and green spring and A5H4 went into the Bcm 11.5

  4. #24
    Join Date
    Jul 2011
    Location
    Oklahoma
    Posts
    42
    Feedback Score
    0
    You might look into the Innovative Arms W.A.R. Use any barrel/handguard you want.

    Negatives include use of proprietary/non-standard parts and a gaping .084-.093 gas port which likely requires drilling out your barrel for unsuppressed reliability.

    I have one with a 11.5 BCM barrel and A5-H0 buffer that works well after careful application of a #44 bit.

Page 3 of 3 FirstFirst 123

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •