Modern Sporter builds Q&A

[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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