Is a PA 15 Multi Lower the Same Size as an AR 15 lower?

[pianoman9701]

I thought for a long time I'd bought and put together an AR10 - my first build. I have been told on the Grendel site that it is in fact an AR 15. I look at the lower and it ways PA 15-Multi. Also, it doesn't have a forward assist. Can anyone tell me if this lower is the same size as the regular AR 15 lower? What about the forward assist? Does that make a difference? I love shooting it. I just am pretty ignorant about ARs.

[Special T]

I thought for a long time I'd bought and put together an AR10 - my first build. I have been told on the Grendel site that it is in fact an AR 15. I look at the lower and it ways PA 15-Multi. Also, it doesn't have a forward assist. Can anyone tell me if this lower is the same size as the regular AR 15 lower? What about the forward assist? Does that make a difference? I love shooting it. I just am pretty ignorant about ARs.

It's an ar 15... I've found it amusing that you insisted it was an AR10 but you had enjoyed a few grapefruit juice and vodkas! Lol

[pianoman9701]

I like to drink before displaying my firearm prowess. It raises my prowess level inside my head. I actually could've sworn that biggerhammer told me it was an AR 10. Maybe he told me after the vodka and grapefruits. 

[Special T]

It's still a MASSIVE Boom stick! Lol

[pianoman9701]

Love it. It shoots all day long.

[JimmyHoffa]

forward assist would be on the upper.

[Special T]

Does it have a cmc trigger? They can be used in an ar15 or ar10

[hunter399]

The fact that 15 multi should be a clue that your running ar15 , but mags be different.I wish I had a ar10 .

[mountainman]

Split the difference and we'll call it the new AR-17.5..?😉

[pianoman9701]

forward assist would be on the upper.

I know that. I was wondering if not having a forward assist would make it different from an AR 15 which has one.

[pianoman9701]

Admittedly, I know little about different AR platforms. The last time I used anything like an AR 15 was the m16 almost 40 years ago. I thought for sure that the guy who helped me build it told me it was a 10. So I was mistaken. That's why I started this thread to make sure. I thought I'd get info from guys who knew better than I.

[jay.sharkbait]

You have an AR 15 and the uppers can come in many different configurations.

The AR10's are pigs compared to a 15 in some of the newer chamberings.

[grundy53]

the AR10's are just bigger versions of the AR15 to accommodate longer cartridges.

Sent from my E6782 using Tapatalk

[mountainman]

forward assist would be on the upper.

I know that. I was wondering if not having a forward assist would make it different from an AR 15 which has one.

forward assist can be had or not had on either the ar10 or the ar15. It does not differentiate what model rifle it is

Admittedly, I know little about different AR platforms. The last time I used anything like an AR 15 was the m16 almost 40 years ago. I thought for sure that the guy who helped me build it told me it was a 10. So I was mistaken. That's why I started this thread to make sure. I thought I'd get info from guys who knew better than I.

if that's the case, he is obviously in error..but yeah, could be the vodka..

[hunter399]

Split the difference and we'll call it the new AR-17.5..?😉

If you split the difference,ar12.5
 

Ar20,it can be 20mm cannon,we can make black,call it assault cannon.