You're right......nothing much breaks. A friend of mine was the armouror for a large Police dept. He always joked that his Remington spare parts supply fit in a shoe box, with enough room left over for a burger and fries. Most of his replacements were bent/squashed barrels, and splintered stocks.
If it makes you feel better, you could get an extra magazine spring, a firing pin and spring, and an extractor with spring and plunger.
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