What spare parts to get

[vicious_cb]

I have a few ARs and want to get some spare parts. I have one lower parts kit and one LMT BCG.
I planned on getting two more LPKs and thought about just getting two more bolts without the carrier.
My questions are; is a bolt ok without a new carrier? Do the carriers wear out or wear with the bolt that the need to be replaced together or can I just get bolts and be GTG? Are there any other spare parts that would be needed?

Barring you lose a spring or detent during assembly most things on a LPK are highly unlikely to break. Probably the only things that I would consider a regular wear item out of a LPK is your hammer spring and your safety detent.

Other than that all you need is a spare bolt(you can cannibalize everything that comes on that bolt that you might need like extractor, extractor spring, gas rings ect.), a spare firing pin, firing pin retaining pin and cam pin.

[m16]

I have a complete spare bolt carrier group for each rifle but also have extra cam pins, firing pin retainers, extractor springs and gas rings in my spares box.

I also have a few lower parts kits on hand but I've never had to rob a part from one of those because of a breakage.

In my own limited experience with both home and factory built guns, whenever I've had a part wear out or break it's always something in the bolt carrier group.

Buffer springs are a good thing to have on hand if you ever take a class or plan on doing any kind of volume shooting.

[Artiz]

Minimum Spare Parts List for a single AR: (if you have more than one AR this list is for EACH)

Bolt Carrier with Gas Key
Bolt Carrier, Stripped
Gas Key
Gas Key Screws (2X)
Cam Pin
Firing Pin
Firing Pin Retaining Pin
Bolt, Complete
Bolt, Stripped
Extractor with Spring
Extractor Spring
Extractor Pin
Ejector
Ejector Pin
Ejector Spring (2X)
Gas ring (3X)
Charging Handle
Charging Handle Latch
Charging handle Latch Spring
Charging Handle Latch Pin
Upper Receiver
Barrel Assembly Complete with Gas Block
Gas Block (with attaching hardware)
Shims or Crush Washer (2X)
Flash Hider
Handguards
Gas Tube
Gas Tube Pin
Ejection Port Cover
Ejection Port Cover Pin
Ejection Port Cover Spring
Ejection Port Cover "C" Clip (3X)
Forward Assist Assembly
Forward Assist Assembly Pin
Hammer
Hammer Spring
Trigger
Trigger Spring
Disconnect
Disconnect Spring
Hammer/Trigger Pins (2X)
Safety
Detent Pivot and Takedown Pin (2x)
Spring Pivot and Takedown Pin (2X)
Detent, Safety
Takedown Pin
Pivot Pin
Bolt Catch
Bolt Catch Pin
Bolt Catch Detent
Bolt Catch Detent Spring
Magazine Catch
Magazine Catch Button
Magazine Catch Spring
Receiver Extension
Receiver Extension Nut
Receiver End Plate
Buffer (one of each weight)
Trigger Guard
Trigger Guard Pin
Pistol Grip
Pistol Grip Screw
Pistol Grip Lock Washer
Buttstock Assembly
Buffer Retaining Detent
Buffer Retaining Detent Spring

[Swstock]

Have a spare rifle for each rifle.

[Black_Sheep]

I keep this kit and a complete bolt, hammer and trigger in a small Plano "tackle box" with my range gear.

https://www.midwayusa.com/product/10...pair-kit-ar-15

[elephant]

Minimum Spare Parts List for a single AR: (if you have more than one AR this list is for EACH)

Bolt Carrier with Gas Key
Bolt Carrier, Stripped
Gas Key
Gas Key Screws (2X)
Cam Pin
Firing Pin
Firing Pin Retaining Pin
Bolt, Complete
Bolt, Stripped
Extractor with Spring
Extractor Spring
Extractor Pin
Ejector
Ejector Pin
Ejector Spring (2X)
Gas ring (3X)
Charging Handle
Charging Handle Latch
Charging handle Latch Spring
Charging Handle Latch Pin
Upper Receiver
Barrel Assembly Complete with Gas Block
Gas Block (with attaching hardware)
Shims or Crush Washer (2X)
Flash Hider
Handguards
Gas Tube
Gas Tube Pin
Ejection Port Cover
Ejection Port Cover Pin
Ejection Port Cover Spring
Ejection Port Cover "C" Clip (3X)
Forward Assist Assembly
Forward Assist Assembly Pin
Hammer
Hammer Spring
Trigger
Trigger Spring
Disconnect
Disconnect Spring
Hammer/Trigger Pins (2X)
Safety
Detent Pivot and Takedown Pin (2x)
Spring Pivot and Takedown Pin (2X)
Detent, Safety
Takedown Pin
Pivot Pin
Bolt Catch
Bolt Catch Pin
Bolt Catch Detent
Bolt Catch Detent Spring
Magazine Catch
Magazine Catch Button
Magazine Catch Spring
Receiver Extension
Receiver Extension Nut
Receiver End Plate
Buffer (one of each weight)
Trigger Guard
Trigger Guard Pin
Pistol Grip
Pistol Grip Screw
Pistol Grip Lock Washer
Buttstock Assembly
Buffer Retaining Detent
Buffer Retaining Detent Spring

You really don't need a Grip lock washer. That's ¢.73 that you don't need to spend.

[Tony617]

I just keep an extra lower parts kit myself. I have a spare BCG and also have gas rings and other parts for the BCG but I fully assembled spare BCG as well. My BCG is a nitride one which is fine for a backup.

https://www.primaryarms.com/spikes-t...rigger-slpk101

https://palmettostatearmory.com/psa-...516446450.html