Modern Sporter builds Q&A

RoughneckRico said:
Interesting, was hoping for less filing and more simply just bolt on.
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What you're looking for then is a milspec forged AR-15 upper which is what all the handguards on the market were designed to fit.
Your other option is to take 5 minutes and grind off the tabs on your handguard of choice if it doesn't fit the way it came.
 
Any trigger snobs here that can chime in on two that i'm looking at for my sporter build??

I'm down to the last piece for my MS build which happens to be the trigger, I'm looking at the TriggerTech AR Diamond or the Geissele SSA-E.
I don't have a ton of exp. with the AR type platform, closest thing would be my WK180 which is a giant POS rife with issues and has a pretty gritty trigger. ( Fk W And K, god dam crooks). After my fiasco with that gun I didn't mind gettin a little spendy building my MS.

Can anyone think of any cons for either trigger? I hear they are both excellent choices. What do you fellows think?

-M

-MRA Match 223 Wylde 18.5 barrel
-MRA V1 15" HG
-SLR Gas block
-JP BCG
-JP SCS
-PWS-E Buffer
-BCM LPK
 
Merovingian said:
I'm looking at the TriggerTech AR Diamond or the Geissele SSA-E.
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I'm more of a snob for SOPMOD approved parts than triggers in general, so go with the SSA-E. I did and I love it. $250 CAD all in from Brownells during any of their Geissele sales.

Additional thoughts: Adjustability is garbage. Price premium with out the body count to justify it is garbage. Needlessly complex housings are garbage.
 
Does anyone know if V7's A5 buffer tubes are good to go? I have a VLTOR backordered at Brownells but want to have a plan B in case they aren't back in stock any time soon. I'd pair the V7 tube with the VLTOR A5 buffer/spring kit and a Magpul STR if it'll work.
 
langfordbc said:
Anybody actually fit an Aero Precision Atlas S-One to their upper yet? I understand the nut may be tight, possibly due to the coating, but how about the anti-rotation tabs?
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Did you ever get an answer with respect to the S-One? I'm specifically curious around the anti-rotation shroud built into the handguard and how it mates to the MS upper / lower.
 
B34R said:
Thanks - appreciate the heads up. (And yes, they appear to have an identical anti rotation design)
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You would have to machine the anti rotation tabs off completely.

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Anyone build a big bore on one of these yet? Want info as to how it ejects and the size of port you have on your upper.

50beo, 458socom, 450 bushmaster, or Rem 30AR calibers specifically.

Smaller cartridges ejecting is of no concern.
 
Madman242 said:
Does anyone know if V7's A5 buffer tubes are good to go? I have a VLTOR backordered at Brownells but want to have a plan B in case they aren't back in stock any time soon. I'd pair the V7 tube with the VLTOR A5 buffer/spring kit and a Magpul STR if it'll work.
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If you are going to run a rifle length gas system on it, you may have problems with the VLTOR A% buffer being a bit too heavy. I used one with an 18" AR and it would have cycling problems now and then. Swap back to a H1-H2 and it's runs with no issues. That being said, the recoil with the A5 installed was basically non-existent.
 
jiffx2781 said:
The first run of slick side uppers (which are already completed) has a large ejection port to accommodate big bore cartridges.

From what I understand there were a few people who didn't take kindly to the larger opening for some reason or another therefore ATRS has decided to go with the standard size opening on ALL uppers going forward.

I do however seem to recall a post where ATRS said that if you are planning to do a big bore caliber you are to notify them and they will still make your upper with the larger port opening.
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Thanks, I know all of this, but even arts has said the cartridge physically fits, but they have not tried to see if a big bore cartridge will actually eject in operation.

So this is why I am asking for a response by someone who has actually built a functioning big bore rifle on an arts receiver and the size of ejection port they have on said upper
 
SilentRadar said:
If you are going to run a rifle length gas system on it, you may have problems with the VLTOR A% buffer being a bit too heavy. I used one with an 18" AR and it would have cycling problems now and then. Swap back to a H1-H2 and it's runs with no issues. That being said, the recoil with the A5 installed was basically non-existent.
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I will be going with rifle length gas, but on a 20" barrel. That should help, no? The A5 kit uses the A5H2 buffer.
 
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