Not even close, look at the FNAR's on sale right now if you want a very accurate and quality rifle or a Keltec RFB, Famae 542 and ATRS modern Hunter to name a few that are better IMO. There's also the M305 for a budget approach and an M1A1 for a not so budget approach to look at as well.
The XCR would be a better rifle if not for the poor barrel retention system, saying that many are pleased with theirs, so if you think it's a good deal...
The XCR's do have excellent warranty support through Wolverine supply.
Cheers D
having owned all of those rifles except the Fnar and the ATRS...
BS... XCR beats them all hands down except the M1A and by M1A I mean a match grade LRB M25
Kel Tec (gen 1) was a lead thrower not a precision shooter, jam oh matic with a finicky gas system. buddy had it for a couple months... then I had it for a month hated it with a burning passion, I spent more time unjamming it then I did firing rounds. Finally got it running correctly and sold it.
Famae 542 was a nice looking good feeling gun... then you shot it... with most factory ammo its like a 3-6 moa gun, with MFSmine was like 8-12 moa and there isn't aftermarket fixes like other guns to shrink that group. Kicks like a mule and will bruise your face if you have a good cheek weld on the solid stock.
M305.... I don't feel like writing up a good rant on it today... but lets just say it could be a $500 good shooter, or it could be a $2500 nightmare to make it an ok shooter... roll them dice... but if you want to make one a precision rig, just buy LRB and save yourself the time and tom ####ery. it ends up being about the same price anyways (if you order from LRB and use profit river arms to import) and the LRB is much nicer fit and finish, has a warrenty and can be legally brought into the states to shoot/hunt.
My XCR-m im loving it... it shoots decently with factory ammo I can't wait to reload for it.
That barrel retaining screw works fine... if it is torqued to the proper inch/lb setting not more not less. under torqued it gets loose, over torqued can damage it, and apparently ####s with the harmonics by putting stresses across the barrel and receiver.