New gnu, King Arms PDW 9mm SBR (former shorty) in Gun Grey.
Internally it's still stock bar a SHS rotary hop unit and a MadBull 6.03 x 229 Black Python v2 (yes I know it's a shit barrel, shut up!), waiting for more disposable income to build a wanker high speed SSG.
Externally, I've done some "work" to it.
Replaced the PDW stock with a stubby fixed one, it does wobble a bit even if tightened down but I've already designed a spacer (only need to get it printed) that in theory should make it rock solid-ish.
Swapped the stock 4" handguard with this lovely Geissele MK8 clone from AliExpress (€16 posted lol), it seems to be fairly solid for such a cheap plastic handguard.
Had to remove the dust cover, as you can see the small adjustment screw got in the way of the cover's pivoting rod.
12cm outer barrel extension in and the KA muzzle device (a really fucking heavy plastic noveske style device) fits perfectly inside the handguard (which is really narrow on the inside, that thing fits with just a millimetre per side of space). Also removed the fake PCC shell deflector as it was necessary to remove the dust cover.
I like the way it turned out, it's lightweight and maneuvrable and the MP5 mags imo look much better than the ARP-9 ones (and they work, and they're cheap to source, and you're not limited to fucking expensive proprietary mags)