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If you're unable to locate an item please contact us directly.

Please have the following information ready:

  1. Firearm Manufacturer
  2. Firearm Model and Serial Number
  3. Gauge or Caliber of Firearm
  4. Part Description
  5. Any other pertinent information

Then please call our Sales Department toll free at:

866-NUMRICH
(866-686-7424)

Outside U.S.A.:

845-679-2417

Office Hours:
Monday through Friday
8:00 a.m. to 4:30 p.m. EST

A-500 Gas Operated (*)

Schematic Image

*Part Key 'NI' stands for 'Not Illustrated'.

Image Part Key Product # Description Price Add To Cart
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77 866980 Regulation Valve $24.40 Sold Out
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78 866970 Regulation Spring $6.75 Sold Out
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79 866540 Centering Washer $8.00 Sold Out
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80 866740 Locking Ring $5.15 Sold Out
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81 866290 Bearing Ring $3.25 Sold Out
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82 866640 Forearm $104.35 Sold Out
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NI 866260 Barrel Extension (Gas Operated) $155.20 Sold Out
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NI 866700 Front Sight Ramp (Buck Special) $18.85 Sold Out
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NI 866890 Rear Sight Assembly (Buck Special) $57.95 Sold Out
Rear Sight Elevation Screw (Buck Special)
NI 866900 Rear Sight Elevation Screw (Buck Special) $2.35 Buy Now
Rear Sight Elevation Spring (Buck Special)
NI 866910 Rear Sight Elevation Spring (Buck Special) $2.35 Buy Now
Rear Sight Pin (Buck Special)
NI 866920 Rear Sight Pin (Buck Special) $2.35 Buy Now
Recoil Pad Screw
NI 392150L Recoil Pad Screw $3.45 Buy Now