Ok, show and tell time. I'm a milsurp guy to the core, so that's mainly what I collect and shoot.
Left to right:
Kokura Series 23 Type 99 - This rifle has provenance as being captured on Tinian. It was taken from a dead Jap that was killed by a mortar round. There's still visible shrapnel in the stock. Unfortunately, the vet who captured the rifle refinished the stock. However, it is all matching, and it still has its matching dust cover.
dot 43 (Waffenwerke Brunn., Brno, Czechoslovakia, 1943) MG34 - Original WW2 parts kit (All parts of the firearm except the receiver, which was destroyed by torch cutting) I built on an 80% receiver (meaning it's not live, just a 25lb paper weight of awesomeness). This MG found its way into Yugo service after the war. It was later imported into the US as a parts kit. Sling is WW2 German as well.
Izhevsk 1944 M91/30 PU sniper rifle. Details can be found here:
http://www.thefewgoodmen.com/thefgmforum/threads/mosin-nagant-m91-30.21745/#post-189588
Maltby 1943 No4 Mk1 - Nothing much to say about it other than it's a bolt mismatch, and it has probably the smoothest action of any bolt action rifle. And the pig sticker bayonet is awesome.
Russian Capture K98k - As the Russians steamrolled west, they captured many K98s that were then put into storage. At some point during the cold war, all of them were taken apart, rebuilt, re-blued and put back in storage. As a result, none of the parts are matching. Some of these K98s did make their way to various nations the Soviets supported during the Cold War, though. This particular rifle is a bnz 41 (Steyr-Daimler-Puch, Austria, 1941) barreled receiver with a true cornucopia of various early, mid and late war German parts. Oh, and the red on the stock is shellac the Russians applied to it for preservation purposes (It's why the PU's stock is red too). Forums are littered with the flame wars of whether or not to remove or keep the shellac on RC K98s. I opted to leave it on, as it is now part of that rifle's history.
Springfield Arsenal June 1943 M1 Garand - This M1 was rebuilt at Raritan Arsenal in New Jersey shortly after the war, and it retains all war era parts except the barrel. It is dated 1946 (most likely when the rifle was overhauled). Notable parts are the late war Type III lock bar rear sights, a Winchester gas cylinder and front sight, a very early bullet guide and an early -3 uncut oprod. This rifle, and thousands of others, were later loaned to Denmark as part of a post war military assistance program. Denmark eventually returned them to the US in the late 90s/early 2000s. The US Army then turned them over to the Civilian Marksmanship Program (CMP), a government chartered entity that sells legal US military surplus firearms to US citizens meeting certain criteria.
Springfield Arsenal November 1942 M1 Garand - This M1 was rebuilt in the 1950s, and it has a combination of war time and post war parts. It spent its service life here in the US. The most notable part on this one is an IHC (International Harvester) oprod. Yep, the tractor company made M1s for awhile post war. The other interesting thing about this rifle is that it has a lead dipped receiver. During the war, a number of receivers weren't heat treated properly and the heels became too hard (This is a part of the receiver that takes a lot of stress. The bolt slams into the heel during operation, so you don't want to have brittle metal there). To solve the problem, the heel of the receiver was annealed by dipping it in molten lead. When the receiver was parkerized, the area that had been dipped in lead had a different tone then the rest of the receiver. This is also a CMP rifle.