5.7x28 ammo catch

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5.7x28 ammo catch for those running a 5.7 upper on your ar15 or similar weapon

print this out slide it into the mag well
then using a lingerie wash bag or something similar cut the bottom of the bag open and zip tie it to the bottom of the catch
Bags similar to these work fine
http://www.walmart.com/ip/Household-Essentials-Lingerie-Wash-Bag/15387199