shooterrex

https://www.gunsprings.com/AR-10/.308 RIFLE/cID2/mID78/dID19

Sure looks like the DPMS slick side target upper. Someone has put a 16" barrel on. I am pretty sure no one makes a rail that is the same height as that upper. Most of those guns came w/a round aluminum free float tube.

I have a bullpup. I didn't like the way a fullsize handled. I have several 10 rounders I just put in my hip pocket.

Without a stainless buffer body you will still be a little light. You also have no idea whose " milspec 308" spring you are using. Large frame guns are not milspec anything. They are a whole different animal. Your bolt carrier group is longer and heavier. You need the proper spring and weight buffer to handle the extra mass.

Hmmm brought a knife to a gunfight. Sucks to be him.

That buffer is to light. Your buffer needs to be in the five and a half ounce range. This buffer,spring,and tube is what the guy that designed the original AR10's came up with. It works. https://www.armalite.com/SACItem.aspx?Item=AR10REKIT01&ReturnURL=/Armalite/Product-Category/AR10-Parts-Accessories&Category=4eeff98b-d9a6-40fd-be6b-ab2e44ec1080

Is this a new gun? Is the Bolt carrier group dripping w/oil? How many rounds through the gun? Please do a search for the "waterboarding thread" and answer those questions. Hard to fix something over the internet without a lot of exact details.

The Sig 365 has the nicest trigger for a striker fired gun I've ever shot.

Welcome from KY.

A 5.56 AR pistol is LOUD. More so than a 308 rifle. Both fired indoors w/o hearing protection hurts. Handguns indoors are hard on the ears also.

Those are nice. I shot my friends. I like it but not enough to buy one.

Lee factory crimp dies won't mess up the headspace and the bullets stay put till they are fired.

That is not a g II. Standard DPMS pattern. Aero doesn't make G II lowers.

I switched to a Sig365 as my all the time gun in front pants pocket pistol. After I shot one and found it just works for me. I still like my Kimber mocro 9 and before that my Diamond Back DB9. The Sig 365 just fits my hand better and has 10+1 rounds on board w/the standard magazine. There is also 12 round magazines but that makes the grip to long to carry in the pocket.

Go to an indoor range that rents guns and have her try several. If it doesn't fit her hands and point well she won't be able to hit much with it. Light handguns are great to pack around but recoil is greater than full size that weigh more.

BCA Creedmoor upper fit an AERO lower just fine for me. Aero is DPMS pattern.

And the Canucks got it from the English.

This is from BCA's website for the 22/250 uppers.

This is the kind of info we need to help you over the internet.

So if there is no gas port in the barrel you have a single shot. You can cycle the rifle manually but it won't cycle itself. There has to be gas going back to the BCG to operate the action.

So there is no gas port at all or you haven't measured it?

If this is a new build is the Bolt dripping with lube?

Like the waterboard thread. List everything. Give us an idea what we are dealing with. Barrel manufacturer and gas port and length would be a good start.

I don't think I have the patience to cut those out like that. I bought the pluck a cube type. Santa did drop off a Rossi Model 92 in 45 Colt since I been good.