Modern Sporter - Build Discussions

jg007 said:
thought guys said the SI FA didnt work? did you have to do any mods?
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ATRS had the spacing wrong of the FA in relation the the bore the BCG travels in on the first batch FA uppers they made, it was too close to the bore by about 0.04" if I remember correctly, so the FA might stick into the bore the BCG rides in and rub the Bolt Carrier. Some FA assist fit no problem, some didn't, depending on the BCG you had. ATRS as far as I know have fixed this issue and going forward this shouldn't be a problem with any FA upper, as long as it wasn't from the first batch they made.
 
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mileageman said:
ATRS had the spacing wrong of the FA in relation the the bore the BCG travels in on the first batch FA uppers they made, it was too close to the bore by about 0.04" if I remember correctly, so the FA might stick into the bore the BCG rides in and rub the Bolt Carrier. Some FA assist fit no problem, some didn't, depending on the BCG you had. ATRS as far as I know have fixed this issue and going forward this shouldn't be a problem with any FA upper, as long as it wasn't from the first batch they made.
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Did we really though? ;-) Or did strike industries just make their forward assists really weird?
 
ATRS Shaun said:
Did we really though? ;-) Or did strike industries just make their forward assists really weird?
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I never did try a strike inustries, because I didn't have one. Mine was a V7 light weight, which btw is dimensionally identical to a Colt Canada, Colt USA, Colt M16a1, a DPMS and the one that came in my Stag 10.

And yes you were off diemensionally. Don't make me take pictures and post them:)
 
DILLIGAF said:
Have you seen my gun, I use it like intended! Not once did the Strike affect anything.
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Doesnt matter what it looks like or your use of it the stike either hangs/rubs/etc or it doesnt. Thx for lettinf me know no performance issues. Assume yours is a first run FA upper?
 
Patt08 said:
Got my receiver set today. Fit and finish is fantastic. Was going together smoothly until I went to put the pistol grip on. There is not enough room to tighten the screw down far enough to get the grip tight enough that it wont wobble allover the place. Going to have to cut my grip screw down i guess.

*Edit* Grip was an ergo. Tried the screw provided and it was too long, and also my a2 grip and screw was too long. Luckily had a magpul one kicking around and it is much shorter. Worked like a charm.
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I had the same issue with mine, all three of my bolts were too long, added a couple of washers. Problem solved.
 
Patt08 said:
Also wondering this. Maybe the electrical tape thing? That’s the only complaints I really have is the barrel fitting loosely into the upper receiver (so loose if I tilted the upper the barrel would slide out onto the floor) and the wobble between the upper and lower is Mildly annoying but not really of much concern.

Back to the barrel fitting loosely into the upper part, perhaps someone else with more experience can chime in on whether or not this is normal/safe? It shot good and tightened up well. The barrel looks to be seated securely where it should be.
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Sounds like a barrel problem not an upper problem. Both of my uppers fit the barrels very tight and I had to use the barrel nut to seat the barrel completely
 
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