shooterrex

If the barrel isn't a snug fit in the upper receiver you can bed it with this.

Welcome from KY. I don't think the receivers are the problem. I have a rifle from PSA and a pistol I built off of a PSA receiver set. How tight did the barrel fit into the upper receiver? You are on the right path on the recoil system.

My Wilson 6ARC barrel also had an undersized gas port. The 6.5 Creedmoor barrel from Wilson was the proper size. Your buffer is a little light. 5 and a half oz range buffers seem to work better in the large frame guns.

The complete upper I bought was in 6.5 Creedmoor. Is shot okay but I replaced the barrel w/a Wilson Combat barrel that shoots much better. The gas block wasn't tightened down properly. When I shot it the first time I had to fix that problem. I have a 6.5 Grendel barrel from them that shoots really well also.

Sounds like y'all had a good day.

All together.

I have a Bear Creek BCG that works with a Wilson combat barrel, Areo Precision barrel,and a Bear Creek barrel. Not a side charger but that shouldn't make much difference.

Buy a bolt from KAK and put it in the Bear Creek BCG. You will have a spare bolt that way. The Bear Creek BCG should work. Just check the head space.

Great to hear it's running now.

Welcome from KY.

https://www.meanarms.com/products/detail/ma-loader-for-ar10

Welcome back.

If you go with what heavy buffers recommends you should be good to go.

Just try it before you start changing parts. You will probably need the buffer you linked and a Springco orange spring. You may need to also drill out the gas port. Most PSA's also have a gas tube that is a bit short. The PSA rifle I bought had a rifle stock so that recoil system was good to go. I did replace the gas tube w/the proper length tube from Armalite. I also changed to a carbine stock and used Armalite's buffer tube and buffer w/Armalite's spring. See if it works first. Lots of lube on the bolt carrier group.

This could get good.

Semiautos need crimped. Neck tension is for bolt guns etc. Your bullets will set back in the magazine while you are shooting a semiauto if you don't crimp them. That's why most of us use the Lee factory crimp die.

Good to hear.

Yes it's long. The last hour or so is the best parts.

Somewhere on the web or at Colt there is a list by serial number of when the rifles were made. Made before x date is preban.

Your buffer is too light weight wise. The Armalite kit is longer w/a longer and heavier buffer. https://www.armalite.com/SACItem.aspx?Item=AR10REKIT01&ReturnURL=/Armalite/Product-Category/AR10-Parts-Accessories&Category=4eeff98b-d9a6-40fd-be6b-ab2e44ec1080 Heavy buffers.com also sells a buffer and spring that works in the 7" tubes. https://heavybuffers.com/ar10carbine.html

Shouldn't matter a bit. As long as the gas port is the proper size and the gas tube protrudes into the upper the proper amount.