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HDSledge

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Posts posted by HDSledge

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted

    3 hours ago, bwikel said:

    I started with the stock springs that came in my guard bolt. I don't have a complete factory guard, I built off a bolt/barrel package. 

    That was probably the old spring they used to start.  Since then they replaced them with stiffer .45 springs.

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted · Edited by HDSledge

    13 minutes ago, bwikel said:

    Full auto no but I do run some suppressed. 

     

    I'm at around 3k rounds unsuppressed.   I will be ordering a couple spare springs and will visually compare with my original one. 

     

    There is discussion about the ejector spring overcompressing and wearing out too fast (hundreds of rounds, not thousands) in the Guard suppressed with some buffer/spring combinations.  Rapid spring fatigue reported with low RoF suppressed full auto setups.  Would a rounded edge 1/16" titanium rod inserted into the spring limit travel of the ejector without chewing up the inside of the spring?  Or an ejector machined with a post into the spring to limit travel?

     

    Still learning so if that idea is bonkers I won't get my feelings hurt.  :)

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted · Edited by HDSledge

    58 minutes ago, NPDriver said:

     

    No it's cool man! I'm glad to hear you're having the success with your rig that you are. This was my first build and I was wondering if I was making a mistake by taking a different path than others. I'm happy to know that I'm not on my own and I have a few guys out there to bounce ideas off of. I haven't got my buffer system nailed down yet. Just running a standard carbine weight & spring for the time being so I'm open to all suggestions. Sounds like the Endomags are working fine by the video clip?

     

    Yes the endomags are reliable.   A lot of us who pre-ordered were skeptical at first and then pleasantly surprised.   I wasn't going to trust them until I fired a bunch of rounds with no problems.  I feel very comfortable keeping the Banshee upper on my lower in case the shtf.

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted

    11 hours ago, cking said:

    CMMG responded the weights are standard in blow back gun not in the guard, got no response on the change in felt recoil, I'm still going buy a set and see what effect they have.

    I have not been able to get to the range to test my Banshee upper with my AR-15 lower.  Interested to see how things go for you with the tuning kit.  

     

    Remind me please do you have a Guard upper on a AR15 lower?  If so which buffer/spring are you using?

     

    A member at arfcom has tested extensively and relates that his best running setup is with an A5 tube, Tubb flat 5.56 spring, and a Blitskrieg 9mm hydraulic buffer.  He says it works well with his 5.56 upper as well.  He tuned for rate of full auto fire as well as felt recoil.

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted · Edited by HDSledge

    8 hours ago, cking said:

    If you go CMMG https://www.cmmginc.com/product/action-tuning-kit-mkg/#  it's says 3.4 oz standard for 9mm DOES anybody carrier come with the weight?

    If your question is does any carrier weight come installed?  The answer is no.

     

    I have the tuning kit and am going to try a Tubb Flat Spring with Kynshot RB5005 AR10 hydraulic buffer (5 oz.)  if my stock Spike's T3 (5,4 oz) buffer and spring doesn't feel right.  Plus I can use the tuning kit weights to tune more.  Took off my LWRC UCIW since tube was too short to allow much tuning of springs/buffers and put back on the Magpul CTR (7" tube).

     

    New to all this and don't compete yet.  Just working on getting to the smoothest most reliable operation.

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted

    8 hours ago, MemphisMechanic said:

    Be aware that your bolt is longer, and the Guard can’t use buffers like the Blitzkrieg designed for the AR9 with having a super short stroke.

    I have a Guard upper/Spike's ST-15 Cal-Multi lower and would like to try a Kynshot RB5004  AR10 hydraulic buffer in my LWRC UCIW (6" tube) stock with its' flat spring.  the RB5004 is 2.5" long or .25" longer than the UCIW buffer.   It is .6 oz heavier at 3.7 oz.

     

    I am very new to the 9 mm PCC world and still learning.  Do you think I may have success with the Kynshot hydraulic buffer with my setup?  Kyntech replied to my inquiry and said it shoulk work.  I have the CMMG tuning kit in case I need to add carrier weight.

     

    The members here have PCC knowledge far beyond mine so your opinions are welcome and appreciated.  Concerns?  Warnings?

    CMMG Guard tuning (9mm)

    in Pistol Caliber Carbine

    Posted · Edited by HDSledge

    New to the Guard/Banshee as well as PCC.  I have a brand new Banshee upper for my Spike's CalMulti lower.  The Banshee will make for 3 caliber uppers (so far) I can pop onto my one sbr registered lower.  I have not tested it yet waiting for Endomags to ship.

     

    Fwiw Brian at CMMG told me that their Guard/Banshee builds are shipped with a standard carbine buffer and a .308 spring.  I'm going to give it a go when the Endomags arrive and hope to be running well without having to swap buffer/spring or install a mag block.  I may/may not have to use one of the carrier weights in the CMMG tuning kit to get things running right.

     

    I haven't tried competition yet but one of the reasons I joined here is to learn more before I dive in.   Looks like I came to the right place to learn about it.

    Whats the new hotness for the 9mm AR Bolt Carrier?

    in Pistol Caliber Carbine

    Posted · Edited by HDSledge
    Removed political content

    Hi folks.  I joined after I spotted a thread on the Endomag on the forum.  I will be testing the CMMG Banshee (RDB bolt system) with the Endomags when they ship end of this month.  I think CMMG has a hit on their hands with their bolt system.

     

    We are about to be in new territory with the CMMG Radial Delayed Blowback bcg along with the Mean Arms Endomag.  The RDB system is not straight blowback and eliminates a lot of the beating a 9mm build gets.  The Endomag (if it proves to be reliable) will supersede mag blocks unless you have a drum magazine.  Buffers and springs may also be simplified.  I am hopeful I will be able to swap uppers on my Spike's Cal Multi lower and slap in the 9mm  Endomag equipped Pmag M2 or M3 and get back on target.   The Banshee and Guard both utilize a standard carbine buffer and .308 spring so I may not have to even swap buffer/spring to get it running right.  

     

    This is my first foray into PCC and I'm glad I waited to learn a bit before jumping in to the earlier technology around blow back systems.  Testing will tell the tale.  Can't wait to get started.

     

    CMMG Banshee upper Spike's Tactical Cal Multi lower

     

    ps.  If you decide to order Endomags for a Guard/Banshee upper ask for that version when you order.  The Guard/Banshee Endomags are not shipped with an ejector tab on the mag.

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