What is this hole on Stripped AR lower?

[Mississippi]

That hole is very useful. I put the spring in and then put a small punch in that hole and another punch to press down the spring. This holds the spring down making the take down pin easy to install.

[trinydex]

heh...

this thread is not at all what I thought it was going to be...

this is what you thot it would be. from words in this thread:

hole for

yellow

water drain out.

That hole is very useful. I put...a small punch in that hole and another...easy

... LUBE...

...how often do you hear "Darn...is stuck...again."

[Greenspartan117]

this is what you thot it would be. from words in this thread:

HAHAHA!!!!!

As for the vacuum thought, it is possible only if it was machined tight enough. The tolerances that it would have to be to create a vacuum would make switching uppers a pain in the booty. Then I would just use a nylon or teflon coated front take down pin if that were the case :-P

[aplinker]

HAHAHA!!!!!

As for the vacuum thought, it is possible only if it was machined tight enough. The tolerances that it would have to be to create a vacuum would make switching uppers a pain in the booty. Then I would just use a nylon or teflon coated front take down pin if that were the case :-P

The take down pin travels ~1/8". The tube length is well over an inch. That means you would up your pressure in the tube by about 2psi... and it's about, what, 1/100 sq in? The vacuum wouldn't be enough to do anything.

[Greenspartan117]

The take down pin travels ~1/8". The tube length is well over an inch. That means you would up your pressure in the tube by about 2psi... and it's about, what, 1/100 sq in? The vacuum wouldn't be enough to do anything.

You are right about that, I was assuming that I had the strength of a baby... :-P I forgot I had been working out a little... but doesn't it sound cool to have a teflon coated front takedown pin?!?! New tacticool part idea...

[CRTguns]

no- it's porting- for reduced recoil and weight reduction.

[trinydex]

weight reduction i believe. recoil reduction... c'mon man, that's absurd.

[aplinker]

no- it's porting- for reduced recoil and weight reduction.

That hole is what makes the AR infinitely better than the Mini-14.

[Sydwaiz]

The hole is so you can take the damn spring out. Since it's a blind hole, crud can jam it up in there. A little pin or some air pressure and you can take the spring out for service or replacement. I actually have an older PWA receiver without the hole.

[WokMaster1]

glory hole......

[technique]

its to remove the detent stick something in there to hold the spring.....

[dilligaffrn]

I've never seen that hole before. I think it is broken!

ROFLOL
LMFAO

[shark92651]

I don't know, I've never seen that hole on any of my lowers. It may be defective - I would call the DOJ and ask for an appointment for them to inspect it to make sure it is safe

[ar15barrels]

this thread is not at all what I thought it was going to be...

I made that hole tight on your lower.
I know you like tight holes.

[ar15barrels]

The front take down pin is retained by a spring and plunger. The hole lets the air out so a vacuum is not formed.

Trust me, the fit between the detent pin and the hole is not anywhere near being airtight.