Please be aware that due to high order volume our order processing time is approximately 5 business days.

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

Please have the following information ready:

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  2. Firearm Model and Serial Number
  3. Gauge or Caliber of Firearm
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  5. Any other pertinent information

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400 MKII (*)

Schematic Image

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

Image Part Key Product # Description Price Add To Cart
image not available
52 510320 Rear Sight Blade $6.45 Sold Out
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NI 510310 Rear Sight Assembly, New Style $25.25 Sold Out
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NI 921700 Rear Sight Assembly, Old Style $25.25 Sold Out
Rear Sight Base Spring
NI 510340 Rear Sight Base Spring $2.35 Buy Now
Rear Sight, Old Style, Blued
NI 921710 Rear Sight, Old Style, Blued $13.10 Buy Now
Rear Sight, Old Style, Stainless
NI 921720 Rear Sight, Old Style, Stainless $13.10 Buy Now
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NI 503150 Safety Detent $4.00 Sold Out
Sight Ball, Old Style
NI 503610 Sight Ball, Old Style $2.35 Buy Now
Sight Elevator Spring
NI 921820 Sight Elevator Spring $2.35 Buy Now
Sight Pivot Pin
NI 510260 Sight Pivot Pin $2.35 Buy Now
Sight Screw, Old Style
NI 510240 Sight Screw, Old Style $2.55 Buy Now