Here is a gun magazine for sig sauer P250-320 full size guns. This is a Factory 10 round 45acp gun magazine. This magazine is made of heat treated steel and uses the same phosphate anti-friction coating used by military and law enforcement. This is a great magazine and it will give you years of reliable service. Gunclip Depot has the largest selection of Sig Sauer gun magazines and gun clips. If you do not see the gun magazine you are looking for send us an email and we will try to locate it for you. Orders shipped within 24 hours except week-ends and holidays.