1. Yes, I still have brass availalble. As a hint, if you look at the bottom right corner of my ad, it shows the last time I edited the ad. If I have an ad posted here on AR15, it would be my hope to have it accurate as of the last time I edited the ad.
2. LC and IMI are both USA Mil-Spec ammo, but they are not the same. LC is produced in the Lake City Munitions Plant (our only US Govt small arms ammunition manufacturing plant), while IMI is Israel Military Industries Ltd. They have produced a lot of ammuniton for the US government since the war in Iraq started, perhaps even since the war in Afgannistan started.
From IMI's website:
The IMI Small Caliber Ammunition Division is Israel’s sole producer of state-of-the-art combat-proven small arms ammunition with an extensive list of customers throughout the world. With an ample experience in the field, the plant offers a complete line of high quality military, law enforcement and commercial grade cartridges. The plant manufactures a complete range of small arms ammunition, ranging from 5.56mm to 0.50 caliber, as well as an broad range of Armor piercing, Sninping and Training munitions. IMI small arms ammunition have received the prestigious NATO Qualification. The plant’s SCAMP lines enable the supply of significant quantities within impressively short time.
The SCAMP lines referred to here are probably improved production lines that resulted from the US Army's Small Caliber Ammunition Modernization Program, and which have been impemented at Lake city.
Mil-spec really matters. As indicated in the following excerpt, most companies that responded to an Army sources sought announcement for 5.56 ammo were not able to meet the equirements.
From GAO-05-687, DOD Meeting Small and Medium Caliber Ammunition Needs, GAO Report, July, 2005:
In an effort to meet DOD’s small ammunition requirements, the PEO initiated additional modernization efforts at Lake City to increase production from a maximum capacity of 800 million rounds in fiscal year 2001 to approximately 1.2 billion rounds per year in July 2004. Despite this increased production capacity, Lake City was unable to meet fiscal year 2004 requirements for small caliber ammunition.
Consequently, the PEO was forced to rely on other ammunition sources. While many commercial ammunition producers responded to the PEO’s sources sought announcements, few were able to satisfy DOD’s ammunition specifications. For example, seven of nine commercial producers responding to the PEO’s announcement for a specific type of 5.56mm ammunition were unable to meet the specifications, such as producing metal cartridge cases. For an announcement for different types of .50-caliber ammunition, none of the 10 respondents were able to meet all of the specifications. Several respondents were foreign ammunition producers. According to officials from U.S. commercial ammunition producers, the recent surge in DOD’s small caliber ammunition requirements could only be met by accessing available worldwide capacity.
The PEO was eventually able to find commercial producers qualified to fill DOD’s small caliber ammunition shortfall in fiscal year 2004. These included Israel Military Industries and Olin-Winchester—a U.S. ammunition producer. According to data provided by the PEO, almost 313 million rounds of 5.56mm, 7.62mm, and .50-caliber ammunition were purchased from commercial ammunition producers in fiscal year 2004. According to a PEO official, DOD paid about $10 million more than a similar amount of small caliber ammunition would cost from Lake City. However, Lake City could not meet the 2004 requirement. Although DOD paid a premium as a result of the need to procure ammunition outside the government-owned base, we did not analyze whether maintaining a more robust base would have been cost-effective.
The PEO purchased approximately 120 million rounds of war reserve stocks from the United Kingdom in fiscal year 2004.
The PEO purchased almost 2.7 million rounds of armor-piercing 5.56mm and 7.62mm ammunition from a commercial producer in Sweden in fiscal year 2004.
Q: What does PEO mean?
A: In early 2002, the Army established the Office of the Program Executive Officer (PEO) for Ammunition as part of a larger effort to establish greater accountability and responsibility in the life-cycle management of DOD’s ammunition programs.