Realistic list of spare parts to keep on hand

[mlberry]

Given a M4gery, what spare parts, given normal wear and tear, should I keep on hand? I am thinking about operator level repairs/part replacement and parts that are likely to wear out and fail under normal (range) usage. So no armorer's work like barrel replacement or any thing that would require special tools. By way of example something like spare gas rings. I see a lot of lists but they seem to list parts that the average use would never replace and/or unlikely to break. So what I am asking is what is a realistic list.

[praythenspray]

I have a feeling many will say a spare bolt. Good idea. Or if you can swing it, even a complete spare BCG. You can load up on the small spare parts from Bravo Company for fairly cheap. gas rings, cam pin, firing pin, firing pin retaining pin, sopmod bolt upgrade/rebuild kit. You don't need special tools for any of that. Just a punch or even a smaller size allen wrench to push the pin out for the extractor swap.

I would also add an action spring or two. For the basic milspec ones from Bravo Company they are around $5 a piece.

[17K]

I would keep gas rings, firing pin retaining pin, extractor w/spring, buffer spring.

[markm]

I would keep gas rings, firing pin retaining pin, extractor w/spring, buffer spring.

That and a bolt is pretty good.

[Send it...]

Hammer and trigger pins too.

[mlberry]

But how often do hammers and trigger pins break? I can see loosing them if you disassemble the lower but how often do you need to do that even to clean it? In the Army the operator was never authorized to do that. I can see having replacement parts for field stripped items that you might drop and loose.

[flenna]

Here is a comprehensive spare parts kit at a fair price.

http://sionicsweaponsystems.com/stor...3-carrier.html

[Send it...]

But how often do hammers and trigger pins break? I can see loosing them if you disassemble the lower but how often do you need to do that even to clean it? In the Army the operator was never authorized to do that. I can see having replacement parts for field stripped items that you might drop and loose.

I’ve broke two over the years. When they shit the bed, your SOL unless you have a spare.

[MistWolf]

Springs-
-Extractor spring
-Hammer spring
-Action spring

Because They Get Lost Or Damaged-
-Take down pin retainer & spring
-Selector switch retainer & spring
-Buffer retainer & spring
-Bolt cam pin

Parts & Assemblies-
-Complete BCG
-Muzzle device shims

[Wake27]

I have a feeling many will say a spare bolt. Good idea. Or if you can swing it, even a complete spare BCG. You can load up on the small spare parts from Bravo Company for fairly cheap. gas rings, cam pin, firing pin, firing pin retaining pin, sopmod bolt upgrade/rebuild kit. You don't need special tools for any of that. Just a punch or even a smaller size allen wrench to push the pin out for the extractor swap.

I would also add an action spring or two. For the basic milspec ones from Bravo Company they are around $5 a piece.

Agreed. All of the small parts on the BCG, a bolt itself, and buffer/action spring. If the other parts are quality and you’re not screwing around with them, you likely wouldn’t need anything else.

ETA - small parts from an LPK would be a good idea too.

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