[AZS]

From the top middle:

P556 (SBR)
556 ER (JS, low 3000 SN)
551 SAN Clone
556 SWAT Classic
552
556xi
556 Patrol

 

[Badpanda]

From the top middle:

P556 (SBR)
556 ER (JS, low 3000 SN)
551 SAN Clone
556 SWAT Classic
552
556xi
556 Patrol

Beautiful!!! Now you need a 556R in 7.62…

 

[LKY13]

Very nice collection. Which one is your favorite?

 

[AZS]

The one in the middle that uses Swiss mags is probably my favorite as far as collecting. From the functional perspective, it's definitely the 556xi on the left. The SBR on top is probably the most fun to shoot (but not so for any bystanders).

 

[LKY13]

Yeah, impossible to have one rifle to rule them all. Or, to scratch every itch. Outstanding collection, though.

 

[BM59]

From the top middle:

P556 (SBR)
556 ER (JS, low 3000 SN)
551 SAN Clone
556 SWAT Classic
552
556xi
556 Patrol

Which rail covers did you use in the P556?

 

[AZS]

The P556 SBR on top has Magpul rail covers on it that are trimmed. The 556 second from the bottom has the OEM SIG rail covers on it.

 

[HermCorps]

Too cool!!! Are u done building ur collection, or u still hunting down other models? Would be awesome if u were able yo find 1 of each model from the 556 line! Either way, super impressive!

 

[AZS]

While that'd be cool, it would be too much $$. Without even getting into the Swiss SAN stuff, I've already seen 5 different styles of US-made lower receivers in just 5.56 caliber - and that doesn't even take into account the different permutations of those lowers - some are hinged, some are AR-style. I had the SIG 556 bug for a long while and just collected them as I had the disposable funds and would find one at the right price.

 

[Greymann]

Very nice collection.