Modern Sporter builds Q&A

[Kratos]

Not sure if I'm understanding what you've posted. You need to tighten the barrel nut but it's the kind that the gas tube feeds through?

Before you panic, try disconnecting the gas tube from the block. If your BCG is fully back (or out of the receiver) you may find you have enough rearward tube travel to be able to remove it without having to fiddle with the gas block.

It’ll work, at least with a Milspec Barrel nut. Just punch the roll pin holding the gas tube to the gas block and pull towards the upper, rotate and pull past the FSB.

Edit: Jiffx beat me to it. HotSoup, if you pay the shipping I’ll fix it for you if you want, I have all the tools and knowledge.

[BCreserveMP]

....
There was no need whatsoever for the fsb to be removed in the first place.

Probably had to draw the nut over the barrel, then install the FSB.

Anyway, we both told him the same thing. Remove the gas tube, and breathe easy!

[jiffx2781]

...

[HotSoup]

Yeah, I think Im going to just send it in. I hate fiddling with punches and roll pins, I always manage to break or scratch something. ALWAYS

[jiffx2781]

...

[greg olmstead]

Update on the Trigger Tech adjustable

My upper arrived and I'm going to have to agree with cwpowell that this trigger is NOT compatible.

Yes there is enough material on the rear of the trigger adjustment screw housing that I can file it down to get the upper receiver lug to go past BUT after taking a good look at it I see that it will leave the housing VERY thin.

It may or may not ever cause a problem but for now I have two other lowers without TT triggers and I only have 1 upper. So for now I'm going to leave the TT alone and put one of my other ones together.

Could you take some material off the back lug and the trigger housing? The lug has lots of material you could cheat a bit on

[Brianma65]

So the Geiselle HSNM trigger won’t work either?
The hook on the upper that’s hooks on the lower takedown pin is hitting the top of the disconnector.

I was thinking I could remove the takedown pin, Nate the U/L and then re install the rear takedown pin.
But when I tryed removing the torque screw, everything just rotated.
Any recommendations on what to clamp on the pin, so it do not rotate ,while removing the screw

[alberta tactical rifle]

So the Geiselle HSNM trigger won’t work either?
The hook on the upper that’s hooks on the lower takedown pin is hitting the top of the disconnector.

I was thinking I could remove the takedown pin, Nate the U/L and then re install the rear takedown pin.
But when I tryed removing the torque screw, everything just rotated.
Any recommendations on what to clamp on the pin, so it do not rotate ,while removing the screw

Needle nosed vise grips from the INSIDE of the lower is how I hold them to install the rear pin, so I don't see why it would not work in reverse.

The rear pin is a standard size so KNS and other like that will fit.

[jiffx2781]

...

[greg olmstead]

That is possible but I really see no reason to do anything to the receiver. I'd have to be pretty bent on using a specific trigger to do that. I would much rather take my chances at ruining a replaceable disposable trigger.

I have a Timney I could steal from another rifle and put it in this lower if I have to. I know the TT will work in the other rifle so I really have no reason to chop up anything.

If I end up trimming the TT so it will work I'm not really worried about it but do I really need to do that to a $300 trigger when I really don't have to.

Kinda sucks because I have two of these triggers and they are my favorite trigger but I can't really complain because I think the list of parts that will be incompatible with the MS receivers will still be very small.

The Calvin elite fits fyi