But his emphatic denunciation of U.S. arms sales to Taiwan made plain that future weapons transfers likely would again threaten military relations.
More than Sudan, Philadelphi - Gaza's international border with Egypt - is the choke point of weapons transfers from Iran to Gaza.
Israel has warned about chemical weapons transfers from al-Assad to Hezbollah in Lebanon and may have already fired on a Syrian convoy attempting the move.
The New York Times has slammed the US government for making an "inexplicable decision" to not apply standard Pentagon regulations for weapons transfers in the Iraq war.
With the exception of the United States, none of the participants offered new assistance, although European nations are considering changes to an arms embargo that would allow weapons transfers to the Syrian opposition.
It ignores the fact that similar, already existing, theoretically friendly monitoring forces - like the US-commanded Multi-National Force Observers in the Sinai - have done nothing to prevent or even keep tabs on weapons transfers to Hamas.
During his visit to Moscow on Tuesday, Israeli Prime Minister Benjamin Netanyahu reportedly discussed the issue with Mr Putin, while Israeli jets have carried out strikes on Syrian targets to block alleged transfers of weapons to Hezbollah.
Jordan, too, is worried about transfers of Syrian chemical weapons.
It has helped build the Iranians a nuclear power plant at Bushehr which will, inevitably, contribute to Tehran's weapons program, if only through technology transfers, training and political cover.
Certain ongoing activities, such as continuing arms transfers to Hizballah that include increasingly sophisticated weapons systems, serve to undermine Lebanese sovereignty, contribute to political and economic instability in Lebanon, and continue to constitute an unusual and extraordinary threat to the national security and foreign policy of the United States.
"We believe that implementation of this agreement, now or in the immediate future, would be premature at a time when China continues its destabilizing transfers of nuclear, missile, chemical and biological weapons technology, and advanced conventional weapons, " the two senators wrote.
Under the new treaty, arms transfers must not be authorized where there is a major risk the weapons will be used to commit violations of human rights or international humanitarian law, among other risk-assessment criteria, which also include the risk of gender-based violence, diversion and undermining peace and security.
CNN: Syrian arms embargo: Why more weapons to Syria is a mistake
The Scotland Bill, presently before Westminster, transfers new powers to Holyrood such as control over national speed limits and air weapons.
As a first step, which would underpin any political process, rather than encouraging the transfer of more weapons to Syria, governments could use their influence to secure a halt to international arms transfers from all governments to any warring party in Syria.
CNN: Syrian arms embargo: Why more weapons to Syria is a mistake
Officers say scammers are making thousands of dollars a week from wire transfers to the island, and that cash is now being used to buy expensive high-calibre weapons that are helping to fuel the violence that has seen more than 1, 200 people killed since the start of the year.
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