AR-15 Carry Handle Thumbscrew Tightness

mdhog · Jul 10, 2020

How tight should AR-15 carry handle thumb screws be? 1/4 turn past hand tight? 1/2 turn past? Full turn past?

Do I need to get out a torque wrench? People complain on the internets of these things moving around with heavy shooting. I don't want my carry handle moving around once I zero it.

3paul10 · Jul 10, 2020

No torque wrench....finger tight but not excessive....I've never had a problem with one. Check it every now and then and make sure it's still tight...

engineerbrian · Jul 10, 2020

I just put one on an AR and set it to 35 or 40 inch pounds IIRC.

Now for a thread jack

I went to sight in the AR mentioned above and had to crank the windage on the carry handle to the right a fair amount to zero at 50 yards. Did I do something wrong when installing the carry handle?

3paul10 · Jul 10, 2020

I dont think you can install a handle 'wrong" brother....

teratos · Jul 10, 2020

3paul10 said:
I dont think you can install a handle 'wrong" brother....

Someone can find a way.

engineerbrian · Jul 10, 2020

3paul10 said:
I dont think you can install a handle 'wrong" brother....

Thats what I’m going with too. I’ll find something else to blame

3paul10 · Jul 10, 2020

teratos said:
Someone can find a way.[/QUOT

I guess you COULD put it on backwards...???

3paul10 · Jul 10, 2020

engineerbrian said:
Thats what I’m going with too. I’ll find something else to blame

Probably just a rifle with a barrel out of whack....that happens on occasion

jpk1md · Jul 11, 2020

Dab of blue locktite and forget about it.......

vipor5 · Jul 11, 2020

Most come with a locking star washer and if not nice and tight with some blue lock tight or both. I think you have a better chance of messing up the selector lever detente spring than messing up the grip screw torque.

A manufacturer purchased grip screw comes with locking compound on the threads.

https://www.windhamweaponry.com/proper-pistol-grip-installation/ just so you see it from a manufacturer. Just don't tell anyone you used this info as they were formerly known as Bushmaster enterprises, because then you might not be able to use the info in Maryland. HaHa

kalister1 · Jul 11, 2020

https://www.portlandbolt.com/technical/bolt-torque-chart/

Lots of info, torque according to size and grade of bolt. Several different grades listed. Always use the lightest torque value if bolt grade is unknown.

I have no clue what grade bolt you have.

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