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 on: Today at 03:21:30 PM 
Started by Verfed - Last post by Verfed

 on: Today at 03:17:48 PM 
Started by massivebarrel - Last post by spector762
What about fluting the chamber like the HK roller locks?
Late to the game and don't want to read 12 pages...  lol  So forgive me if this has been mentioned before, but this is part of a 3-part fix I am going to perform on mine.  Essentially I'm mixing a couple things HK has done in a few different designs.

1&2.  Send barrel out for professional fluting and chamber polishing.  The flutes and polishing will help with case sticking.

3.  Mill a round cut-out in the bottom of the carrier, heat it to red hot, then insert a tungsten weight in it.  Weld the seam and grind flush.  Very similar to what HK had to do to the UMP to slow the carrier and prevent bolt bounce.

Caveat:  I had one of the rifles that seems to be flawless with 147gr NATO Milsurp whether it's Port, Dag, Hirt, whatever.  Works just fine.  Little dirty but fine.  I have the old style plug in and run an OSS suppressor on normal. 

However, I have noticed if I run anything higher pressure like match ammo, it will get case sticking.  I believe the rifle is over-gassed slightly with the short gas tube and it unlocks and attempts to extract way too fast.  I'm also noticing bolt bounce, but if I dial the gas back, I don't get positive extraction and ejecting.

My solution:  Increase bolt mass and add gas until the system runs a little more smoothly.  We're talking microseconds here, but as HK found out, microseconds count.  Just my .02 cents.
i think fluteing the chamber would be a good idea not enough to ruin brass but like pof does i still am waiting to hear back from one of the tool makers on that   but yea and there is a guy on here that has made a tungsten guide rod i believe he added a tad over 4oz seemed to help him as well

 on: Today at 03:13:42 PM 
Started by massivebarrel - Last post by Kenndapp
This gas plug has me excited for the mdr again. Is there room to beef up internal diameter and volume of the gas plug expansion chamber?

 on: Today at 02:52:07 PM 
Started by LeeMajors - Last post by HBeretta
User accessible gas plug...awesome. Something DT should have done but failed.

yeah...he made it look easy didn't he?  i'd be interested in how well this handguard holds zero considering materials used and how it's mounted.

 on: Today at 02:41:47 PM 
Started by LeeMajors - Last post by whiskey91lima
Great design Rich. If I still had an MDR, I would but one.

 on: Today at 02:24:42 PM 
Started by HBeretta - Last post by MarkB
Let's talk money. Right now there are two green KS7s on GB for $545 + $35 + $25 transfer (here in DE) and $549.99 +$30 ship + $25 transfer. Total $605 and $604.99 at current bid levels (could be more. Yesterday, two black KS7s sold for $529.99 + $30 ship + $25 transfer for a total of $584.99. I have two local dealers looking for a black or green KS7. The cost is $465 (black) and $525 (green). These costs are out the door. There is no sales tax in DE (nice). So, if I wait for the dealers to find a KS7 I save $119.99 for the black and $80 for the green. Very good reasons to wait for my LGS to find one. And YES, I'm still obsessed with the KS7. It's a good sickness.

 on: Today at 02:16:16 PM 
Started by whitetail - Last post by whitetail
With using the M-lock, you can also still get a 1913 pic-rail section and just attach to the handguard. Personally, I would have FedExed the stuff tossed in the garbage bin to the US. Lol

Having Mlok ontop allows you to use a pic rail, just like the idf model having a rail section up top, one single slot intended dor a Magpul MVG is on the bottom.

 on: Today at 01:57:55 PM 
Started by LeeMajors - Last post by superduty
Very happy with their handguard for my RDB. I am sure what they develop for the MDR will be a great improvement over the plastic one.

 on: Today at 01:38:16 PM 
Started by LeeMajors - Last post by thehun
Your work is always top notch.

User accessible gas plug...awesome. Something DT should have done but failed.

 on: Today at 12:33:09 PM 
Started by LeeMajors - Last post by HBeretta
nice work man.

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