How do I know if my lower has .250 takedown pin holes or larger?

[sbi]

No, I do not have a caliper. I have Anderson lower and looking for upper receiver, not necessarily Anderson. Do I better off getting Anderson anyways because it will most likely fit, or is there a way to know which holes my lower receiver has?

Thanks.

 

[pochito413]

I have an Anderson lower that matches up nice with an aero upper. I will try to find my calipers and measure the takedown pins in my lower for you

 

[RImike]

.250 is 1/4 inch

My Anderson lower has the standard .250 holes

 

[pochito413]

cant find my calipers but the more I think of it I used the takedown pins from the kit and they are the standard .25 holes.

 

[jtnf]

Have a drill index? Use them as gage pins.

 

[sbi]

Thank you.

 

[Gillham]

For what it's worth. Harbor Freight has coupons for their calipers, for what - like $10? For the longest time I always told myself, I don't need a caliper - and if I ever did, I don't want a crappy harbor freight one... But I bought two recently and I have to say, it's hand - even if it's not 100% reliable/precise.

 

[sbi]

For what it's worth. Harbor Freight has coupons for their calipers, for what - like $10? For the longest time I always told myself, I don't need a caliper - and if I ever did, I don't want a crappy harbor freight one... But I bought two recently and I have to say, it's hand - even if it's not 100% reliable/precise.

And I was at HF last Saturday, I visit about once a month, and every time I "remind myself" to by one of their digital calipers and guess what - forgot yet again

 

[josh2600]

My frankford arsenal digital has been great. Costs more than a hf ($40), but it's been reliable for me and pretty accurate.