First AR15 build

[johnestmon]

For your first build I'd recommend a forged. If you mess up and scratch it or brake off a trigger guard ear it's easier to forgive yourself due to the lower cost. Of course neither of those thing will actually ruin your lower as they can be covered up and it will still be functional.


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[greg vess]

Yes, too much play will affect accuracy, but how often are you going to see something that bad unless something is out of spec.
I'm not an armorer but I've built a couple of uppers and several lowers so I'm somewhat familiar with the platform. It didn't sound as if the OP was looking to build a precision rig, just something reliable using proven parts.
Accu-wedge? Hey, it's your money.

It doesn't make the rifle more accurate by any means. It just take out a little movement between the two receivers. To much movement can lead to inaccuracy. That's a proven fact. Hell they cost 1 dollar and 50 cent. It's worth the insurance if there is a little movement. Things can be taken a little to literal!

 

[mtdawg169]

It doesn't make the rifle more accurate by any means. It just take out a little movement between the two receivers. To much movement can lead to inaccuracy. That's a proven fact. Hell they cost 1 dollar and 50 cent. It's worth the insurance if there is a little movement. Things can be taken a little to literal!

Where could one find the factual data to prove that upper to lower fit affects accuracy?

I'm not a fan of extremely sloppy fit. But I don't see the need for matched receivers either. In 10+ years and dozens of ar's, I've never had one that was so loose that it needed replacing. The sole exception to that is an Aero Precision upper receiver whose pivot pin lug was out of spec and allowed side to side movement of the upper. That gun shot fine. However, the upper was actually replaced due to the spec issues. The ones I've seen that I would consider excessively loose had seen alot of use and were still completely reliable and reasonably accurate. Conversely, I've had a few that were too tight or receivers from different manufacturers that simply would not mate up due to the upper or lower being out of spec. We're overthinking this issue. Just buy from a reputable source and roll on. The barrel, ammunition and proper assembly will ultimately define the accuracy potential of the rifle. If the OP is looking to build a plinker to shoot fmj at paper, cans and tannerite, who cares? If he's going for a hunting rig or wants to shoot little groups at 200+ yards, get a barrel that's appropriate for the intended purpose.

 

[fish4food1]

I want to thank everyone for their input. I will post a picture when the build is complete!