MKII vs. MKIII barrels

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Nogunsmith4me

Single-Sixer
Joined
Mar 20, 2008
Messages
149
I'm not sure if I'm posting in the right area.. :roll: but here it goes anyway..... Just wanted to know if the barrel of a 1992 MKII Standard be replaced with a new MKIII Hunter 4.5" fluted barrel? Will it fit the MKII receiver without any problem? Thanks guys!
 

Nogunsmith4me

Single-Sixer
Joined
Mar 20, 2008
Messages
149
Anyone?:roll:.....anyone out there that can help me with my question about switching barrels? Thank you guys!
 

wwb

Hunter
Joined
Nov 18, 2004
Messages
2,786
Darned if I know..... it's pretty common to switch the entire upper to another lower, but I don't recall ever hearing of anyone switching just the barrel.

Never tried to separate them, but I'll bet the required torque is measured in ton-miles rather than pound-feet.
 

captainkirk

Blackhawk
Joined
Jul 30, 2002
Messages
538
wwb":25n39gmb said:
Darned if I know..... it's pretty common to switch the entire upper to another lower, but I don't recall ever hearing of anyone switching just the barrel.

Never tried to separate them, but I'll bet the required torque is measured in ton-miles rather than pound-feet.

You also have to have the feed ramp line up exactly when the torque is in the proper range. Not easily done. If you want to change them out, I'd reccommend the whole upper.

captainkirk
 

Nogunsmith4me

Single-Sixer
Joined
Mar 20, 2008
Messages
149
I was thinking of keeping the MKII serialized receiver with the new barrel but now I changed my mind, it's not worth it. Thanks guys for responding!
 

billbeamon

Bearcat
Joined
Aug 25, 2009
Messages
15
It can be done, but often there is some slop, er, manufacturing tolerances, and some 'adjustment' may be required.
I put a MKIII standard barrel on a MKII frame (and vice versa) and found I could not extract the magazine after firing a few rounds. It seems the 'slingshot' action of the bolt had driven the MKIII barrel receiver forward enough to pinch the magazine. I used the Dremel to grind about a 1/16th off the receiver where it was pinching and the problem went away. There were no problems the other way around...
Bill Beamon
 

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