I'm in this situation...active duty mil...could be sent anywhere against my will.
1. Revocable Trust. If the state you are moving to is Class III, SBR, SBS, Suppressor friendly. Have the schedule A changed to reflect the new state for notary. Verbiage may need a change based on state requirements...but unlikely. This is property and the state will see it no differently with respect to the trust.
2. The engraving on the weapons should be simple like..."Your Name Revocalble Trust"...that's another reason trusts are a good route.
3. With a revocable trust you can also identify a co-trustee in the trust. Say a family member lives in a friendly state. You move to a state of 10 round mags, no folding stocks and evil bayonet lugs. The toys go to the family member, co-trustee, for security, not use.
Remember...the items belong to the trust...not you. You are simply the trustee...but have the authority to maintain/use the property listed in the Schedule A. The revocable trust can be changed. Remember...a BATFE Form 5310.20...IS NOT...required for intrastate transport of suppressors. Only DDs, MGs, SBSs, SBRs. Block 3 of the form indicates a permenant move...or temporary move of items.