Our lower parts kits contain all high quality, 100% USA produced components, manufactured to our exacting standards. Each kit is guaranteed to fit your mil-spec dimension lower receiver. We don’t use foreign-made parts, polymer parts, or MIM parts. These are quality kits at an excellent price.AR15 Lower Parts Kit – Spring KitAll of the springs for the AR15 lower receiver. Perfect for spare parts or for an ultra-custom build.
- Hammer Spring
- Trigger Spring
- Disconnect Spring
- Pivot pin detent spring (2)
- Selector detent spring
- Bolt catch detent spring
- Buffer retainer spring
- Magazine catch spring
- 100% USA Made
Dustin (verified owner) –
Great product as always from BTO. My #1 place for parts!
ty (verified owner) –
Good backup springs.
Aaron Helms (verified owner) –
Always good to have spares
roejoe (verified owner) –
if you need springs this is what you need