Being a lefty, having an ambi safety naturally seems like a good idea. Is there a general consensus for lefties with small hands as far as what ‘style’ of ambi selector to get? Also, do you guys recommend a small amount of grease in the selector channel?
I added a small amount on the last two builds I did and it really made them pretty ‘flickable’ but still had positive engagment…
lefties with small hands = BAD-ASS ST
Honestly, it’s a no brainier in terms of that:)
Your reducing the awkward 90 degree throw to 45 degrees
I am a lefty, but I don’t have small hands. I’m the exact opposite, I have freakishly long fingers and huge hands, but the solution was the same. BAD-ASS-ST.
The Europeans have been building guns with 45* throw selectors for about a day or two now (:rolleyes), it’s about damn time that the M4 got the same treatment. With the -ST and short levers, the lever doesn’t stick into your hand, and ergonomically, it just feels better. You can let your thumb ride on the top of the selector similar to a 1911 ‘safety’, then quickly flick it back to safe when you need to.
Definitely a BAD-ASS-ST.
I was originally thinking to sick with 90 degree selector, but I might have to re-think that…
I assume most run a thin lever on your trigger finger side and something that stands more proud for your thumb to actuate more easily?
What combos are you guys using?
I do see that the BAD-ASS-ST won’t work on just any lower. Forgive my ignorance, any details on this?
Right now, I have 2 short levers with my 45. When they come out, I’ll be replacing them with short cranks.
The short crank being different from the regular crank?
Yes. It’s… shorter. :lol:
From what I understand, everything else is ergonomically the same.
Please go to this thread for 45 degree selector info: https://www.m4carbine.net/showthread.php?t=82851
The “lawyer pin” is the only thing that stops it from being compatible with any standard AR receiver. We do not suggest or recommend its removal, for it will result in voiding the warranty.
It may sound stupid to you and me (it is), but we just don’t need to open doors to litigation. On a 45 degree selector, the position marker points at 10 to 11 o’clock, making a drop-in short throw selector a liability issue for us. For months, the 45 degree selector was on the brink of being shelved because of it. the “lawyer pin”, as much as we don’t like it, actually saved the 45 degree selector project.
The infamous lawyer pin:
In terms of lever choices, with the free lever exchange program, the choice does not need to be final at the time of purchase, or ever 
Should you like to try a lever that might work better for you, just drop us an email with your shipping address and we will ship it to you to try, before you return anything to us.
The program is unconditional. Date and place of purchase and condition of the lever (used, beat up, painted over) are immaterial, we will exchange them for you. This also gives our customers the flexibility to try and outfit their selectors with new levers that were not available at the time of purchase. Since its introduction in May of 2010, we’ve added three levers and an end cap.
The mystery 7th lever and short crank will make it 8 levers :jester:
^Wow, very cool! I didn’t know about that. No more fretting over choices now!
Thanks for the info, Duffy. Dang lawyers, eh? 
Looks like I’ll have to just get my file out…
Damn straight…
There is not a single piece of kit that I would recommend above the BAD-ASS ST in terms of my confidence in the fact that the end user would be totally satisfied with the end product.
And yes this includes Karl Lewis’s mighty monolithic rails, and Bill Geissele’s terrific two stage triggers:p
We can not suggest or recommend its removal, for liability reasons (for us and the end users).
I took a dremel tool and cut a notch on the left side of one of my el cheapo Olympic Arms receivers to allow the 45 degree selector to go in without modifying it.
For the end users, if it’s modified and used on a non-45 degree compatible receiver (that is it to say, without the proper 10 o’clock FIRE engraving), they’ll need to be careful when others handle their weapons, as externally, it looks just like a standard AR, while the selector is half as long, or twice as fast.
We have no power to enforce anything after a customer purchased it, it is their property.
This is all lawyer talk. Personally, I wonder about the lowers with pirate or zombie themed engravings. In a court of law, I’m not sure how LIVE equals SAFE, DEAD equals FIRE, and UNDEAD equals AUTO will stand up:jester: But I digress, I’m glad they’re doing well with these receivers, though we wouldn’t dare to do anything like it 
I’ve got some receivers in the white, maybe I’ll see if I can get some custom engraving done on the safe/fire locations. After all, nobody wants to void any warranties!
Three things that make the 45/90 receiver stand out:
Notch on the left side of the receiver’s selector hole
Mill off the selector stops, as the forward selector stop is very close to the new FIRE engraving. If the forward selector stop is removed, you might as well remove the rear because it’ll look funny.
new FIRE engraving at 68 degree. 68 degrees engraving will allow both a 45 and 90 degree to point at it, we never recommend a strictly 45 degree engraving, because then if you put a 90 degree selector in there, it won’t point to FIRE anymore.
Groovy. Might be a fun ‘project’…
I like ‘breaking’ stuff to make it work. Oh and uh… that’s not a dremel, that’s just my toothbrush you hear in the background…
HAHA! Yup, thats just the sonicare…
I’d likely have to pry it from my own hacksaw wielding hands. I think I might try this. Duffy, do you have any pics of the ‘notch’ that accepts his lawyer nub?
EDIT: This picture was also an early indicator to me that there were plans for a 45* CASS-3P fun switch selector in the works. Look at the FA markings. 
Thanks viper, that picture from AXTS is perfect.
When a selector is installed (ours or anyone else’s), the notch is covered by the selector. Unless you use a reversible selector, in which case there’s nothing on the left side of the receiver, the notch is visible.
If one chooses to use our selector as a single lever selector, he can cap the side that’s without a lever, the cap covers the notch too
So the notch is present on both selector holes?
No, it’s just present on the left side. The right side is normal. All it does is allow the ‘lawyer pin’ to clear the receiver as it’s being installed.
If you’re going to mod, I would advise doing so to the selector rather than the receiver. It’s a cheaper part, easier to replace (especially for NFA receivers), and although it voids the warranty, I wouldn’t be surprised if Roger still tried to take care of you to get you set up with the uh… correct selector for your lower.