Area 419 Arcalock clamp, and MDT ACC dovetail

Stoweit

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Purchased an Arcalock clamp for my bipod and installed Arcalock clamp and barrier stop. Clamp says it works with either Arcalock rail or RRS rail, MDT says rail is RRS compatible. with the three pins removed clamp won't even tightened down, with pins in it won't stay in place once pressure is applied. Even though clamp is supposed to work with either, do I need to get Arcalock rail, or is it possible MDT Arca rail built into chassis is out of spec? Thoughts?
 
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briscoetab

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Since you haven’t gotten a response yet I will but not sure how much help my info will be.

I don’t know about an MDT but I have the MPA and I just got the area419 clamp. On the MPA with the pins in the clamp holds tight as far as I can tell, I’ve only tested it in the house but I hit on it and pulled on it pretty good. I left the pins in for now because I have an element that I put the area 419 universal rail on and the pins work with it and I wanted to see how it would hold with the pins in if I was switching bi-pods between the two.

So don’t know if that helps much but the clamp will hold on dovetail for MPA with the pins still in.
 

Theradone

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I experienced this as well but don’t give up on area 419, they are a fantastic company. That being said the clamp does not fit “all” arca, as some companies such as KRG or RRS have the advertised 1.5” width, the dovetail seems to fluctuate slightly from brand to brand. Unfortunately I had to return the clamp and buy a RRS clamp (luckily found one all the way in Australia). This is something they are no doubt working on and I would highly recommend getting ahold of them to discuss the issue.

As a side note, as somebody who uses a friction style clamp to secure my bipod to my KRG arca rail, I will suggest looking into Area 419’s locking arca rail. I have experienced my bipod moving down the rail after prolonged strings of fire and it can be frustrating at times. After testing the full Area 419 arca lock system, it is significantly better at holding the barricade stop to whatever you connect to it or keeping your bipod in place. I am not sponsored or paid by Area 419, they just had amazing customer service dealing with this same issue with me and most likely paid more in shipping than what I paid for the part as they expedited me another to have to send that one back as well. Sorry you have the same misfortune of a part not fitting as advertised.
 
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Stoweit

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Thanks for your help, I have a bunch of 419 stuff that has been bomber. Left a voice mail today, but haven't heard back yet.
Wasn't sure if I was doing something wrong.
 

just browsing

Gunny Sergeant
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Not an exact comparison but I have a 419 Railchanger that worked fine on the MDT dovetail. Not sure the clamp is the same as the Arcalock system but I did not have any issues with lockup.
 
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1jonathan1994

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My 419 clamp needs the pins in to clamp an MPA rail and spigot. It eats the chassis up pretty fast but holds.
If 419 would give the clamp just a little more travel we would not need the finish scarring pins.
 

Theradone

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Just Browsing, Thank’s. 419 just called me back, The clamp I have is out of spec, they are sending a new one as soon as they come in. Great CS
Awesome! Glad they fixed that dimension issue.
 

SAMR

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Just Browsing, Thank’s. 419 just called me back, The clamp I have is out of spec, they are sending a new one as soon as they come in. Great CS
I'm glad it's getting worked out for you. Great CS has been my experience when dealing with Area419.
 

Stoweit

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No idea, my clamp full closed off the rail measured 1.59" RRS rail measures 1.49. Seems the clamp I got was approximately .10 out of spec.
Not all arca rails are the same, MDT says they use RRS rail spec of 1.5", so my chassis should work with RRS arca style clamps, which is what Area 419 is supposed to work with. I'm sure Area 419 will make it right, every other product I have from them is awesome, and so far CS is top notch. I don't think you would want to use the Arcalock clamp with the pins in on a non Arcalock rail, as I'm sure it will tear it up.
 

MDT_Josh

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Sorry to hear that you've run into some issues and let our C/S team know about the potentially out of spec dovetail on the chassis too! You can always find us at mddtac.com and submit a support ticket by following this link or giving us a call at 1-604-393-0800!

Again, not sure if it's your chassis or the clamp by skimming through the comments, but let us know how we can help.
 

Stoweit

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Spoke with Area419 and sounded like it was clamp. MDT rail was 1.49 which is in spec for an RRS Arca Rail I believe. Thanks for checking.
 

MDT_Josh

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Spoke with Area419 and sounded like it was clamp. MDT rail was 1.49 which is in spec for an RRS Arca Rail I believe. Thanks for checking.
Fair enough and good to keep in mind that the width isn't the only thing controlled by the RRS sepc. We have seen some clamps on the tighter side not clamp on our integral dovetail due to cerakote thickness. However, of the clamp is off my 0.010" then that's a whole different issue.
 

Stoweit

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Josh, was the cerakote too thick to let the clamp work. With this clamp tightened all the way you can just slide it back and forth, with almost no pressure.
 
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Stoweit

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Tried RRS clamp yesterday and it worked fine, so definitely Arclock clamp is out of spec not the chassis.
 
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