Anderson Manufacturing Whoops! Kit

Manufactured by Anderson Manufacturing
Manufactured by Anderson Manufacturing
44 Reviews

In Stock

Standard orders will ship out in 1 business days or less if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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Anderson Manufacturing builds rifles, pistols, and parts utilizing the latest in computerized manufacturing. By keeping manufacturing in house, Anderson can offer quality, American-made products at an affordable price, backed by a limited lifetime warranty.

The Anderson Manufacturing Whoops! Kit contains those little springs and detents that everyone has accidentally launched across the room while working on an AR-15!

Kit includes:
  • (1) Hammer spring
  • (1) Trigger spring
  • (2) Hammer/trigger pins
  • (1) Disconnector spring
  • (2) Takedown/pivot pin detents
  • (2) Takedown/pivot pin springs
  • (1) Safety spring
  • (1) Safety detent
  • (1) Magazine release spring
  • (1) Bolt catch plunger
  • (1) Bolt catch roll pin
  • (1) Bolt catch spring
  • (1) Buffer retainer
  • (1) Buffer retainer spring
  • (1) Trigger guard roll pin
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BrandAnderson Manufacturing
Manufacturer.Anderson Manufacturing
Weight0.5 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

44 reviews


It comes with a sticker


AMAZINGLY I didn't need this while working on my first build but i know if i didn't have it it would have been a problem. Quick inventory of the package showed i had everything there.Excellent S&H from PA

Anderson Manufacturing Oops Kit


Bought these parts for my next AR build.Have not completed yet but all items are in good shape so don't anticipate any problems.Extremely pleased with the customer service.Ordered my parts at noon and by 1 they were ready to ship.Received them at 1 the next day!Hard to get that kind of service any more,sad to say.Very pleased.

parts kit


cheapest way to get the spring i needed to replace.

oops kit


Everyone should buy one of these with there lower parts kit.Fast delivery from Primary arms.

All there


Everything as advertised.

anderson Oops kit


Excellent service, staff was very friendly, and well informed about the items I purchased. I give them 5 stars, and will be a return customer in the future...

Good parts kit


Good for a new build, for replacing old/worn parts or for carrying key parts in your grip in case of a failure while away from mom's basement.

great value


good price and great kit for those that buy aftermarket safeties,takedown pins, triggers etc

Nice kit


Good quality parts at a good price

"Just In Case"


Got the OOPS kit for spares & possible breakage in my rifles.Just do the math of buying this kit "piece-by-piece". An awesome bargain from Primary Arms & Anderson Manufacturing!!!