Grex Crown Auto-Fire Stapler

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20 Gauge 1/2 Inch Crown Auto-Fire Stapler22 Gauge 3/8 Inch Crown Auto-Fire Stapler21 Gauge 1/2 Inch Crown Auto-Fire Stapler
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GREX patent pending auto-fire speed dial allows the GREX 50AF, 71AF and 80AF fine wire stapler to shoot one staple or rapid-fire several staples per single trigger pull. Turning the auto-fire speed dial counter-clockwise (towards A - Automatic) increases shots per minute and turning the auto-fire speed dial clockwise (towards S - Single) reduces shots per minute.

For projects requiring a heavier flat-wire staple with a wider crown and thicker gauge, the GREX Crown AF fine wire stapler uses a crown staple with lengths ranging from 3/16" to 5/8".

GREX, demanded by Pros, for more than 20 years has helped professionals rise to the top of their trade. Now explore.
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  • Auto-fire speed dial for single-fire or rapid-fire per single trigger pull
  • Auto-fire speeds range from single fire to 18 staples per second
  • Patented trigger valve allows for fast-air-recycling and rapid shooting
  • Drives crown staples ranging from 3/16" to 5/8" in length
  • Operates at 20% to 40% lower air consumption than the competition
  • Convenient quick release magazine latch for fast reloading
  • Drop-in loading provides quick fastener reloading
  • Heavy steel head cap for hammering
  • Slim profile offers maximum visibility and mobility
  • Lightweight aluminum body designed for mobility and all day continuous use
  • Precision machined aluminum piston and cylinder
  • Durable driver and O-ring assembly
  • Rear exhaust with silencer reduces noise and directs exhaust air away
  • Rubber handgrip for a comfortable firm grip
  • Compatible with Duo-Fast 5000 series and Senco F series staples


  • Dimensions: 8.5"L x 5.5"H x 1.5"W (21.6cm x 14cm x 5.3cm)
  • Weight: 2 lbs. (0.9 kgs.)
  • Operating Pressure: 70 ~ 100 psi (4.1 ~ 7 bars)
  • Fastener Type:
  • 50AF - 20 gauge 1/2" crown staples (Duo-Fast 5000)
  • 71AF - 3/16" ~ 5/8" (5mm ~ 16mm)
  • 80AF - 21 gauge 1/2" crown staples
  • Fastener Range: 3/16" ~ 5/8" (5mm ~ 16mm)
  • Fastener Capacity: approx. 100 staples
  • Air Inlet: 1/4" (6mm) NPT male plug


  • Upholstering, Carpet laying, Light wood assembly, Display and sign work, Luggage construction, Silk screen assembly, Home building applications, Applying drapery fabric to cornices, Sign shops, Box spring and mattress covers, Automobile interior, Installation of light trim moldings, Light gauge metal piercing, Roofing paper, Etc...



Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.