Busted AR lower

[stevie]

I did that on one of mine. Used JB weld, seems to be fine.

[223556]

I think the Stark grips look looks fine. Never noticed it covered the ears.

[bob_e95482]

It seems every time a thread like this comes up, someone recommends the aluminum braze that in reality is crap, then someone chimes in that 7075 can't be welded. I have welded 7075. My own receiver, with no ill effects. And, of course, JB weld.... the ultimate Bubba repair.

[Tjfearl]

When I install my trigger guards I make sure that I support the bottom ear with a roll of electrical or wood, Also use the correct punch and whatnot. But, the stark grip is hideous.

[mdib870]

if you know anyone who tig welds you can weld it back on you just have to clean off the anno in that spot cuz the ano contaminates the crap out of a weld after that just grind it smooth and spray it with a little aervo flat black good as new

[Guntech]

As others have said, find a good TIG welder, if you were closer to me I would send you to my buddy he does a lot of firearm related welding.

[johnyreb]

I have a 1x4 x 6" long of trexx covered in utility carpet with various size holes drilled in to it. It makes removing pins easy.

[spy-d]

Yea, I had my lower over a base as well, and it didn't take much. I use a 2.5 oz brass hammer to install or remove these roll pins.

I am now wondering if that the rollpin was metric and was too big. I check others, and it would seem that was the case here.
The roll-pin WAS too big.

And I just had to replace the blasted trigger guard.

[kcstott]

Ok a few things.
Casting are week in thin areas. this is where a forging is stronger. Forged or cast good luck welding it. Cast is a pain to weld if it good clean cast. Forged 7075 is not good to weld on as it tends to crack big time after it's welded.

As for the roll pin. Well they are about .010" to .020" over size depending on the diameter so yeah they require some hammering to get them in place. I like to ream the holes right on size or a little over. There is no reason the pin needs that much of a press fit.

[Speedpower]

or you good braze it back together with this kit.

This never works! don't waste your money!

Using JB Weld to glue it back is way better!

[xbimmers]

What he said!

there is a reason my registered lowers still have the original trigger guard on them, even though it would be cool to have a newer design installed.

[Ninety]

[saki302]

Buy a cheap polymer bench block to support the parts during hammering.

Worked well for me so far.

-Dave

[duggan]

Ok a few things.
Casting are week in thin areas. this is where a forging is stronger. Forged or cast good luck welding it. Cast is a pain to weld if it good clean cast. Forged 7075 is not good to weld on as it tends to crack big time after it's welded.

As for the roll pin. Well they are about .010" to .020" over size depending on the diameter so yeah they require some hammering to get them in place. I like to ream the holes right on size or a little over. There is no reason the pin needs that much of a press fit.

I go a different route and smash the roll pin together a bit on the starting side, works like a champ.

[kcstott]

I go a different route and smash the roll pin together a bit on the starting side, works like a champ.

That works too.. It all comes down to what you are trying to hold in place, and the trigger guard is not going to ruin your day if it falls out. Either way would work.