AR15 Lower with stripped grip threads
- Thread starter Msteers
- Start date
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1/4. 20. I think. Otherwise I'll give you 5 bucks for the lower. It's trssh. JK
Corrected by Chad in next post. Shows how many times I have changed a grip...
Sent from the 3rd Rock
Corrected by Chad in next post. Shows how many times I have changed a grip...
Sent from the 3rd Rock
clandestine
AR-15 Savant
It's 1/4-28
You need tap magic aluminum tap fluid and you need to go very slow. Even though it's aluminum you can break the tap.
You need tap magic aluminum tap fluid and you need to go very slow. Even though it's aluminum you can break the tap.
![1105171038[1].jpg](/data/attachments/189/189890-a878d66b9d90c70fb0c612a8f86002ef.jpg)
That is good info....I'm going shopping in case I ever need it.
Heli coil ...
If you have to, the auto shops sell helicoil package set up to do one hole.
iH8DemLibz
When All Else Fails.
If you're careful, and don't blow the walls out, you can step up to 5/16-24.
The area you're drilling and tapping is roughly .375-.380 in width.
You'll want someone with a milling machine to do the work.
The area you're drilling and tapping is roughly .375-.380 in width.
You'll want someone with a milling machine to do the work.
Maybe a longer screw with a nut inside the lower. Makes it full auto too?
Sent from the 3rd Rock
Sent from the 3rd Rock
Just use a heli coil its a steel insert and will not strip as easy as aluminum.
Ranchero50
Ultimate Member
If you went in sideways and stripped it I'd chase a regular 1/4-28 tap from the top down (start inside the lower) to straighten the threads. Then use the next longer bolt so it will grab good threads deeper in the bore. As long as it isn't shouldered you won't have problems.
iH8DemLibz
When All Else Fails.
5.56blaster
Ultimate Member
J B Weld or maybe duct tape. Gorilla tape is great!
clandestine
AR-15 Savant
That is a solid plan but the angle and pocket depth of the lower won't allow this method unless you have a tap extension or a very long 1/4-28 tap.
clandestine
AR-15 Savant
You need to try and straighten out the messed up threads. Don't drill it oversize ilunless you are installing a helicoil. Those are the only good options.
OrbitalEllipses
Ultimate Member
If he's going to an insert, a Time-Sert is far superior to a Heli-coil.
U can use the same size treads and chase it from the inside the bolt will straighting the threads .
Only by the locking pegs ,just lock tight the heli coil in
https://m.youtube.com/watch?v=LpDduCVUy6w
Last edited:
forkauto
ΜΟΛΩΝ ΛΑΒΕ
I agree 100%, don’t use a heli-coil use a time sert, solid metal instead of a spring
