MP5K lower - how easy is it to change one?

[Lozart]

I've been looking at the ASG/B&T MP5K PDW as the possible answer to me need for a secondary to carry with my M249, the issue is that the ambidextrous selector fouls on my knuckle if you try and change to full retard auto. Is it a simple swap to change it for a non-ambidextrous lower or do I just need to dremel off the lever on the right hand side?

[two_zero]

The selector would fall out if you dremel away one side of it.. unless you just remove the sticky-outy-bity?

as for the lower receiver I can recall it was pretty easy thing to change last time I did it

[Lozart]

unless you just remove the sticky-outy-bity?

 

 

This was what I was planning

 

Are SEF lowers reasonably cross manufacturer compatible? Ditto the fire selector?

[two_zero]

never tried the sef... but I'd go ahead cut it off it was me

[Lozart]

Just noticed that the classic army mp5k actually comes with a sef lower. Of course nobody's got it in stock!