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Net Sales - Breakdown of Net sale (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Segment Reporting Revenue Reconciling Item [Line Items]
Total Net Sales	$ 1,059,195	$ 529,618	$ 481,336
Handguns
Segment Reporting Revenue Reconciling Item [Line Items]
Total Net Sales	755,735	390,711	336,901
Long Guns
Segment Reporting Revenue Reconciling Item [Line Items]
Total Net Sales	253,340	101,540	107,717
Other products and services
Segment Reporting Revenue Reconciling Item [Line Items]
Total Net Sales	$ 50,120	$ 37,367	$ 36,718

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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