Modern Sporter builds Q&A

[robab]

https://www.cheaperthandirt.com/pro...s&refType=&from=fn&ecList=7&ecCategory=485268

As luck would have it. The parts for the cmmg kit can be purchased separtly. So it wouldn’t be a stretch to buy a spare part so you don’t end up with a useless like of parts if it doesn’t work out. Brownells has some parts also.

 

[charlesquik]

Any picture with forward assist? There is only picture of the slick upper.

 

[DILLIGAF]

Any picture with forward assist?

Not released yet

 

[Brianma65]

Yes, the FA isn’t out yet, march? Maybe

 

[kelaa]

My BCM LPK trigger intrudes into the space for the safety, so I cannot insert the GI style safety. Is the trigger safety bar something that is typically handfitted, or is the Modern Sporter dimensions a bit off?

 

[jiffx2781]

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[Kratos]

My BCM LPK trigger intrudes into the space for the safety, so I cannot insert the GI style safety. Is the trigger safety bar something that is typically handfitted, or is the Modern Sporter dimensions a bit off?

Install the trigger then #### the hammer. Safety will slide in. If it doesn’t fit then there’s an issue.

The trigger always has a part that is underneath the safety. Here is a quick video, trigger is installed already.

https://m.youtube.com/watch?v=SV06L_MPBj4

 

[kelaa]

Install the trigger then #### the hammer. Safety will slide in. If it doesn’t fit then there’s an issue.

The trigger always has a part that is underneath the safety. Here is a quick video, trigger is installed already.

https://m.youtube.com/watch?v=SV06L_MPBj4

I'm pretty sure what's what I'm doing. You can see the trigger safety bar in the way of the cylinder path that the safety needs to go through during insertion.

 

[scourge18a]

If using a milspec style trigger can you not install the safety first, then the trigger assembly?

 

[Kratos]

I'm pretty sure what's what I'm doing. You can see the trigger safety bar in the way of the cylinder path that the safety needs to go through during insertion.

Press on the hammer and disconnector (little metal plate above the trigger) and see if the bar moves. I have a BCM Trigger in mine and it all just slid together. Noveske safety but all Milspec parts.

 

[kelaa]

Okay, thanks for the replies. Once I remove the hammer / hammer spring assembly, the trigger bar can drops down out of the way. With the all the trigger / hammer components in place the trigger safety bar cannot be pushed down to clear the way. I wonder if this is a BCM or ATRS issue. Prehaps worth a minor note to those novices following the typical video instructions.

 

[robab]

I used Bcm lpk in my sporter. Fit together perfect.

 

[Brianma65]

I used Bcm lpk in my sporter. Fit together perfect.

don’t get to exited, you hzvnt tryed to put your upper on yet

 

[robab]

don’t get to exited, you hzvnt tryed to put your upper on yet

Correct. What can I expect

 

[Brianma65]

Correct. What can I expect

Chances are it’ll be fine.
Only a few triggers that don’t work so far.
Are you using the trigger from the LPK?

 

[QuickDraw16]

What are people torquing their barrel nuts to?
Seems that the most cited range is 35-80 ft-lbs

I’ve got mine somewhere around 40 right now

 

[purplezuk]

If it’s a proprietary barrel nut , the manufacturer will have a spec. 40-50 is pretty standard.
The battle arms aluminum nuts I put on at 45 ft/lbs. they don’t require indexing.

 

[Jeffv]

I had a quick question about the dust cover. Currently it doesn’t seat tight to the upper. It sits about 1/8 away from completely closed. Is anyone else having this problem. I was thinking about going with an adjustable one from strike industries but I don’t know if this will solve the problem. Currently I have just a cheap steel one installed. On a completely different topic has anyone considered filing down the catch on the charging handle. I was thinking long term it might wear down the upper since upper is aluminum and the charging handle catch appears to be steel.

 

[Brianma65]

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Brownells brand works.

 

[jiffx2781]

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