I just got one of these and filmed a segment with it for TacTV- it is a very easy SBR build, which is what I did with mine, biggest challenge is finding someone to thread the barrel for a suitable flash suppressor

The buttstock end cap removal is a piece of cake

Overall quality is excellent- I had been tipped off about this importation while back by a SIG 550 collector buddy of mine and sure enough here they are

Here is my .02 cents; if you ever wanted a Swiss made 550 series weapon and could never get one you need to buy one of these ASAP- plain and simple. This needs to be viewed as a true last call for this weapon from the original manufacturer - in addition to being the only 553 series weapons imported thus far into the US it is a no brainer

Guaranteed in the not too distant future these guns will be approaching 10k when you find one for sale

I'm glad I got mine and added it to the 550 series collection

Cheers

LAV