This is going to be a newbie question. h.gif I'm trying to remove the buffer tube from the lower receiver. I'm using the an AR combo wrench but it seems like 2 parts of the receiver end plate are hammered into the crown nut so I can't remove it easily. Can somebody suggest on what I should do? Thanks.

im gonna guess that you mean the castle nut and end plate are staked together.



either manpower or a dremel should do fine

Should I get a lower reciever vice block before I proceed? I guess it's not a good idea to clamp my Colt 6920 lower. hock.gif

there are options to clamp the lower and clamping the lower itself isnt one i would put on the list.

Quoted: This is going to be a newbie question. I'm trying to remove the buffer tube from the lower receiver. I'm using the an AR combo wrench but it seems like 2 parts of the receiver end plate are hammered into the crown nut so I can't remove it easily. Can somebody suggest on what I should do? Thanks.

Why are you removing the buffer tube?

My guess is that if it's staked then it's a milspec tube, Colt Maybe?
If you are just changing out the stock for a different milspec one, then just pull off the old one and slide on the new one, no need to change tubes. if you're going with a non milspec set up, dont do it,

To remove the stock pull out on the whole adjusting lever, hard, in order to pull the pin over the edge of the tube rail, easier yet, just pull the end of the lever towards the front of the rifle to retract the adjustment pin from the tube

if you are wanting a different tube for the number of positions, I myself never use more than "all in" or "all out", 2 position is fine, 4 position is more than enough,

If you're going to put on an A2 stock then just disreguard this whole post, its a slow night

I'm changing my original Colt 4-position mil-spec buffer tube to a CMT(Stag) 6-position one, thinking that it will offer longer & more adjustments.

Is this going to cost more hassle than I thought? I guess worse case is I need to get a new castle nut right? Please advice.

in my opinion the two extra positions are'nt worth it

you can reuse the old parts if you clean up any burrs

I wouldnt do it.  99% of the time you shouldn't ever be using the longest setting (unless you are 6'6") and 6 positions are stupid.  3 handle most issues... I prefer 4.

Colt tubes are milspec, staked, and good to go.  You wll be installing a new stock that isnt.


That being said - if you want to remove it - get a correct castle nut wrench that engages the nut in three places, then torque it loose.  The stake will shear.  You wont need a new castle nut - the wrench will typically break first.    You dont need a receiver clamp, I just use two pieces of wood loosely in a vise if they are really tight.