An Overview of the Samson Field Survivor Multi-Tool
Please be aware that this is an overview, and not a review. I have not had a chance to use this tool, so I can't give any honest evaluation of performance or suitability for its intended purpose. I can only provide my opinion of the product based upon my time with it at the 2013 SHOT show.
I've found the manual, located here, to be useful in describing how each of the components are intended to be used.
Broken shell extractor: Nice to have one of these.
Wire brush for bore cleaning: This is threaded onto the piece, so it may be possible to install a 30cal brush if you're using a 300 Blackout, for instance.
Ampule for oil for one field lube: I like the fact it's designed to be refillable - use whatever oil you like best, whether it's CLP or Mil-Slip-Frog-Tec-Glide-6000.
Cable to pull the brush through the bore: While one should be careful about dragging a steel cable through a steel bore, it's not bad as an emergency option for a service weapon. This should never be (and is not intended as) your main means of cleaning your weapon's bore.
Carbon scraping tool: Really nice to have. Not having a good carbon scraper can end a range day.
Flat blade screwdriver: You can never have too many of these.
Feed lip adjustment tool: This is novel. You use this to straighten the feed lips of any magazines which you've identified (via the various gauges on the tool) as being out-of-spec.
Gas key cleaning tool: If you keep the brush attached to the tool, you can use it to clean out the gas key on your bolt carrier.
Cotter pin hook: Useful - built into the screwdriver.
Front sight adjustment tool: This tool has only three prongs because the broken shell extractor rests where the first prong would sit, but it would work fine on any four-notch front sight base. Five-notch sight bases wouldn't work with this.
Strike Plate: this feature strikes me as being of dubious value in a pistol grip accessory.
Magazine feed lip gauge: This is a gauge built into the body of the screwdriver, and it ensures that your magazine's feed lips are in spec. There's also a notch in the exterior of the tool which serves to verify that the outer geometry of the feed lips are in spec as well.
The tool in its collapsed configuration, ready to be stored in a standard AR-15's A2 grip. Note that other versions are available for Magpul grips. The body is hard plastic, with a rubber O-ring towards the bottom which the grip compresses as you screw it on, which expands it out the sides and thus firmly seals the tool into the base of the pistol grip.
The tool fits into this compartment on a standard A2 pistol grip.
The tool with all of its arms extended, as seen from the left side.
The tool from the right side, with its base removed. Note the two replacement firing pin retainer pins for the bolt carrier group in the base.
When stowed, the tool adds a slight amount of extra protrusion to the pistol grip. They advertise it as a striking surface.