Purchased a SD  complete upper months ago and put it in the safe for some time since I don't have an optic for it. I recently put the SD upper on two different lowers and there was some wobble/play in the upper. I'm a bit surprised since I have less expensive uppers that have little to no wobble in the upper. It doesn't appear to be a concern,  just more surprised.

Anyone have similar experience. I'm sure it won't affect accuracy from what I have read.

My complete SD has some noticeable, but not severe, play. I just put an Accu-wedge in it 🤷🏻‍♂️

An accuwedge definitely works, so good advice here, but I’d suggest that if it’s minimal, that’s normal when you don’t have a Matched set.

You’re dealing with tolerances on both the lower and upper, that combined, can allow for movement or in some cases even tightness.  I wouldn’t stress it, but I defer to those more knowledgeable than me.  I’m all about reliability and if it runs, then it runs.  I’m not a bench shooter so I can’t speak to the impact of it on consistency in groups.  Curious myself about other opinions on this….

From our support section;

"Geissele receiver sets are made to the military standard tolerances that have been in use since the early 1960’s.  There will be play and rocking between the upper and lower receivers.  They are designed this way to handle the dirt, dust, mud and water ingress that is part of the life of a combat weapon.   Some shooters desire a tight fitting receiver set.  Geissele rifles manufactured with forged receivers and our forged upper and lower sets are not designed to be this way.  Our experience has actually shown a decrease in accuracy with bedded and tight receiver sets.  Gene Stoner and Jim Sullivan must have been on to something!"

-GACS

Some great information here. Don't get me wrong, I love my Geissele SD. The fit and finish Is fantastic and the play is very minimal. Can't wait to get it out to the range.

Farmer had a dog and his name was…….

So there it is, thanks for chiming in!

My SD does have a noticeable amount of play. Way more than my Colt.

It runs perfect and shoots around 1 1/2 MOA pretty easily so not a big deal at the end of the day.

Buy a stripped LMT MARS lower, everything fits tight they have a "speed bumps" design you can get a perfect fit with .