AT3 Tactical MOTHERFU-BAG The BIG AR-15 Lost Parts Kit Springs Detents Wear Parts and More
No ratings yetBest price
$31.49at OpticsPlanet
Out of stock checked Nov 10, 2026
In stock now instead
- AR-15 Lower Parts Basic Ambi Build Kit $31.99at GunMag Warehouse
- AR-15 Lower Parts Lite Kit W/No Fire Control Group Black $31.99at Ammunition Depot
- Bolt Rehab Parts Kit For AR-15 /M16 $29.99at GunMag Warehouse
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $31.49checked Nov 10, 2026 | Out of stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
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Price history
Dashed line = out of stock. Tracking since Oct 23, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $31.49 | $29.99 | $31.49 |
Since Oct 23, 2026.
About this part
The AT3 Tactical MOTHERFU-BAG The BIG AR-15 Lost Parts Kit Springs Detents Wear Parts and More is an AR-15 lower part from At3 Tactical. One store lists it, OpticsPlanet at $31.49.
Specifications
- Manufacturer
- At3 Tactical
- Type
- Kit
- Platform
- AR-15
From the manufacturer
AT3 Tactical MOTHERFU-BAG The BIG AR-15 Lost Parts Kit Springs Detents Wear Parts and More. Snap a spring? Dont get mad just fix it with this AR-15 Lost Parts Kit Alright so yall seem to like the FU-BAG. Like a lot. Which probably means theres a lot of little springs detents and pins lying around in dark corners around America. But weve heard you asking for more. More ways to get you out of that hole after youve Fed Up Building A Gun. Heres our answer. To better fit the rage weve all felt as springs bend cotter pins break or when guns just plain stop working right weve come up with a new kit for all those lost and wear parts your gun needs. The MOTHERFU-Bag contains a big mix of upper and lower parts for the AR-15 that commonly get lost break wear out or just plain bend too far out of whack to use again. As always remember to wear your eye protection whenever youre dealing with parts under spring tension. Trying to fix an AR with no depth perception isnt the easiest thing in the world. Specifications for AT3 Tactical MOTHERFU-BAG The BIG AR-15 Lost Parts Kit: Manufacturer: AT3 Tactical Gun Make: AR Platform Gun Model: AR-15 Features of AT3 Tactical MOTHERFU-BAG The BIG AR-15 Lost Parts Kit All parts meet or exceed military specifications (Mil-Spec) Package Contents: AT3 Tactical MOTHERFU-BAG The BIG AR-15 Lost Parts Kit Hammer Spring Trigger Spring Disconnector Spring (2) Hammer/Trigger Pin (2) Firing Pin Retainer (3) Gas Ring Extractor O-Ring Extractor Spring Bolt catch plunger Bolt catch roll pin Bolt catch spring Buffer retainer Buffer retainer spring Magazine catch spring Selector detent Selector detent spring (2) Takedown/Pivot pin detent (2) Takedown/Pivot pin detent spring Trigger guard roll pin (2) Gas Tube Roll Pins (1) Adhesive bandage for any other boo-boos you make AT3 Tactical AT3-BIG-FU-BAG: MOTHERFU-BAG The BIG AR-15 Lost Parts Kit Springs Detents Wear Parts and More
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