Used these these to retrofit my older F1 mainframe so it'd be compatible with the new vapor series of bags, they work well
My strap buckle was busted on my FAC Track pack, and this buckle has a perfect fit. I used reloading lube to help the strap slide through the buckle. I also used needle nosed pliers to help pull the strap through.
Buckles worked great. I was concerned that the slit in the rear cross brace would weaken the brace, but it doesn’t. Strong hold. Very pleased.
Spare Buckle - Field Repair 25mm Ladder Lock
Very easy to install and durable for being a replacement.