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M4 Research for R&D


Guest cleefurd
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Guest cleefurd

Benelli varies these (2) dim's on their M4 barrels, particularly on the entry length version.

 

A former 2112 (USMC Match Armorer now with the Army) asked me for input to compare with his rack M1014's, both full length and SBS-entry guns.

 

Anybody with a depth-mic (or that knows how to use the rat-tail on his calipers as a depth checker) please share these two dimensions.

 

Obviously there are no wrong answers, but any insight shared would mean a lot.

picture.php?albumid=10&pictureid=530

Thanks,

Kip

Edited by cleefurd
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Guest cleefurd

BTT These dim's are reaaaaallllllly important.

 

Please help.

 

When the "what-where-why" becomes apparent the effort will be worth it.... honest.

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Guest cleefurd

Rally cry ....

 

I'll provide a free premium M4 spring to the first 20 posts providing those dimensions, from stand-up forum members with 50 or more posts.

 

Kip

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Here is what we measured at the shop..

 

Factory Entry barrel: I.D. - .720", O.D. - .915"

Factory 18.1 barrel: I.D. cylinder choke at muzzle - .704", I.D. cylinder choke before muzzle where it meets the barrel when screwed in about 2+ inches in - .735", O.D. - .930"

 

Hope that helps...

 

Stan

Edited by deltaopwong
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Guest cleefurd
Another foreign made part on a Benelli! :eek:

 

Not on the parts list, and finish machined for us by yours truly here in the US:)

Edited by cleefurd
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Working hard on those recoil reducers / 8th round extender combo unit huh?

 

I would get you dimensions, but I don't want to give you bad info ... in the middle of a move and all my stuff is packed up somewhere, if you still need it in a few days I can get you it.

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Guest cleefurd
i have to agree the orig post was not very clear.

A screen capture was the only way to convey the inquiry, sorry about the low-res quality.

 

At any rate the feed-back is spot on:D. Great dimensions and priceless info.

 

Offer still stands. Dimensions welcome here !!!

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