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MCX bolt and a Geiselle reaction rod? Login/Join 
Web Clavin Extraordinaire
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posted
MCX will be in my hands sometime this week. Can anyone tell me if an MCX chamber (300 BLK) is essentially the same as an AR chamber, such that I can use my Reaction Rod on it? Want to swap muzzle devices immediately and don't prefer to rely on a mag well vise block. Guessing the MCX upper also wouldn't fit into an AR upper vise block.


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Chuck Norris put the laughter in "manslaughter"

Educating the youth of America, one declension at a time.
 
Posts: 19219 | Location: SE PA | Registered: January 12, 2001Reply With QuoteReport This Post
Freethinker
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My Geissele reaction rod won’t work with my MCX chambered for 300 Blackout because the lugs on the rod don’t fit into the slots of the barrel extension and therefore the rod cannot be inserted into the extension for full engagement. Although I didn’t measure them, in looking at the MCX bolt and the reaction rod, the lugs on the MCX bolt are visibly narrower than the lugs of the reaction rod.




“To argue with a person who has renounced the use of reason is like administering medicine to the dead.”
— Thomas Paine
 
Posts: 43978 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
Web Clavin Extraordinaire
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Thanks for the info. Have you tried an AR upper vise block?


----------------------------

Chuck Norris put the laughter in "manslaughter"

Educating the youth of America, one declension at a time.
 
Posts: 19219 | Location: SE PA | Registered: January 12, 2001Reply With QuoteReport This Post
Freethinker
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I don’t know if there are different models/versions of the MCX, but mine is the “Virtus” and its upper receiver is shaped significantly different than the usual AR configuration. I didn’t want to remove the sight from my MCX to check the actual mismatch between my Brownells upper receiver vise block, but it’s obviously quite a bit and the block wouldn’t be usable, IMO, with the MCX.

A bit of research revealed that others have had the same questions. Midwest Industries specifically states that their receiver rod don’t work with the MCX Virtus, and I wasn’t able to find any affirmative answers to the vise block question.




“To argue with a person who has renounced the use of reason is like administering medicine to the dead.”
— Thomas Paine
 
Posts: 43978 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
Web Clavin Extraordinaire
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After some experimentation, my Wheeler upper receiver block (attaches via the pivot pin holes) works on the MCX.

Just as an FYI to anyone else in this situation.


----------------------------

Chuck Norris put the laughter in "manslaughter"

Educating the youth of America, one declension at a time.
 
Posts: 19219 | Location: SE PA | Registered: January 12, 2001Reply With QuoteReport This Post
Freethinker
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That's good to know. Thanks.




“To argue with a person who has renounced the use of reason is like administering medicine to the dead.”
— Thomas Paine
 
Posts: 43978 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
Member
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Me personally I would not use the pivot pin holes for barrel work. Lacking other direct to barrel options like a reaction rod I would use a set of barrel vise jaws of some kind. The ones I have work well for this (I used them to change the FH on my MCX and numerous other guns where I can't use the Geissle).


“So in war, the way is to avoid what is strong, and strike at what is weak.”
 
Posts: 9602 | Registered: October 14, 2004Reply With QuoteReport This Post
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