PayPal doesn't like the firearms industry. Here is their user policy
You may not use the PayPal service for activities that:
1.violate any law, statute, ordinance or regulation.
2.relate to transactions involving (a) narcotics, steroids, certain controlled substances or other products that present a risk to consumer safety, (b) drug paraphernalia, (c) items that encourage, promote, facilitate or instruct others to engage in illegal activity, (d) stolen goods including digital and virtual goods (e) items that promote hate, violence, racial intolerance, or the financial exploitation of a crime, (f) items that are considered obscene, (g) items that infringe or violate any copyright, trademark, right of publicity or privacy or any other proprietary right under the laws of any jurisdiction, (h) certain sexually oriented materials or services, (i) ammunition, firearms, or certain firearm parts or accessories, or (j) ,certain weapons or knives regulated under applicable law."
"Regardless of whether justified of not, you will feel sad about killing another human being. It is better to be sad than to be room temperature." - Joe B Fricks.
01 FFL, GOFFA, NRA, GOA, IAVA, VFW, ABATE of Iowa D15.