Springer Precision Open/Limited Magwell for Sig Sauer P320 AXG - BRASSStep up to our largest magwell for the Sig Sauer AXG grip modules and change mags with speed and confidence in your Open and Limited division matches! 17rd mags will need to use our 140mm basepads for Limited SP0219 or our +10 basepads for Open SP0239. For 21rd mags, you can make 140mm with part SP0218. Change your mags with confidence whether it's in the field or on the course of fire! Brass weighs 3. 5oz. Due to design variations, Springer Precision