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Every part checked against this replica, grouped by category. The tag on each row says how well the answer is backed. Use the evidence filter to see only fits a maker or retailer has named.
M4A1 MWS spare magazine (35 rounds)FitsMaker
Tokyo Marui

Tech - 35rd Gas Magazine for MWS GBBRFitsRetailer
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A retailer lists these four as tested. Not confirmed for the Double Eagle N4, where a buyer reported a wobbly fit.