The first time I saw such a latch was on Keith's # 5 I assume Croft developed it. The purpose of the latch and large head cylinder pin is for easy removal.

Len

I'd always seen the large pin, just hadn't noticed the latch.

MB
Can you post a photo of the Davis gun?

Len

LEN,
I HAVE NOT SEEN A PICTURE OF THE DAVIS SIXGUN. SEARCHED MY LIBRARY AND FILES LAST NIGHT NO LUCK. 
I CAN MAKE A COPY OF THE "GUN NOTES" COLUMN  PIECE AND MAIL IT TO YOU. SEND ME A PM AND I'LL GET IT IN THE MAIL IF YOU LIKE.
MB

Thought I'd post the 44 spl Clements Custom Guns did for me on a 357 Ruger several years ago. I didn't think to ask him if a locking base pin latch was possible.

[IMG]http://i20.photobucket.com/albums/b233/targetshootr/DSCN4241-1.jpg[/IMG]

Very nice gun target shooter. You could put the #5 latch on it but it does require welding the frame hole. If you do not already have one a belt mountain pin with a set screw is a very good improvement usually gets rid of slop in the factory pin and can lock up so the pin does not come forward or disengage under recoil.

Len

SUPER GUN targetshootr!
I LIKE THAT FRONT SIGHT.
WHAT KIND OF REAR DID YOU USE? DOESN'T LOOK LIKE A RUGER REAR SIGHT FROM WHAT I CAN SEE.
I WILL HAVE TO HAVE A # 5 BUILT ONE DAY. I WILL USE SAFARI'S AND YOUR GUNS FOR INSPIRATION.
SIMPLY WONDERFUL SIXGUNS GUYS AND THANKS FOR SHARING.
MB

Thanks Safari. Mad, he made a one-piece custom rear sight to resemble the original. He's in the process of making two #5s on USFAs which he said he'd post a pic of when they're done. I swapped him an officers target barrel so he could see how the original adjustible front sight was made. At the time he built mine he wouldn't make one so l had it made by a local machinist.

[QUOTE=SafarisAfrica]MB
Can you post a photo of the Davis gun?

Len

[/QUOTE]
THOUGHT YOU MIGHT LIKE TO SEE THIS LEN.
HERES A PICTURE OF ELMER'S .44 MAGNUM 29 BULL BARREL SIXGUN.
BUILT BY BILL DAVIS. 
IT WENT FROM KEITH TO COL. REX APPLEGATE'S COLLECTION.
MB 
[IMG]http://i433.photobucket.com/albums/qq55/madbohemian/100_04281-1.jpg[/IMG]

Rare find in a room of rare finds. Have to find a place on the website for this one.
AL

Thank you I do appreciate the photo

Len

This is a Texas Longhorn Arms Improved #5 in .45 Colt made by the late Bill Grover.