Wondering what is on the list for $150. Inner barrel, hop up, bucking, spring, piston?

compression components usually... sometimes barrel.. hopup rubber.

Cylinder head, piston head, nozzle (sometimes) around 40-50$
good hopup rubber like pdi w hold 13$
I roll with prommy barrels, so that's around 70$

spring and piston are irrelevant. Properly tuned compression and hop can lift a BB out to 50-60m Which is beyond your 150ft requirement.

A stock TM pistol using .28s can hit targets at 50m (man sized) reliably. That would make the BB travel probably around 250fps on green gas.

At bare minimum
barrel + hop up setup
piston head
air nozzle

And the rest is fine tuning. Getting rid of wobble, making sure the hop up is leak free, making sure the cylinder setup is leak free and compresses right away. With a good air seal you should a deviation of less than +- 2 fps and at least 50 fps more than the spring is rated for.

I've purchased a few of the suggested items for my current load out. I will try testing a couple of the candidates mentioned when the weather turns.

Thanks guys.

Deepfire Hop Up
 

If youre an armalite fan find yourself a deepfire ptw style hop up unit. You will have to change out the hop up unit inside for a total of 7$ from redwolf. All said and done i can price one out for about 500 with similar range and accuracy of a ptw.

Slight Modifications required for fitment.

Warning, I have a Deep Fire PTW style hopup and I have yet to find a body it fits in. Tried King Arms, VFC, G&P.

I've installed Lonex nozzle, piston head and cylinder head with a ProWin Hop Up using PDI /w hold bucking. Running a 483 mm Madbull Black Python 6.03 and BB Bastard .28g bios.
Fielding it next weekend and I will post my results.

never been a fan of the prowin hopups... but the rule is.. if it works, it works.

My G&G m14ebr long is very accurate right out of the box, as is my Bolt b4 sop mod. Not too far behind is my Magpul pts pdr. A friend has an Aftermath Kraken that's just stupid accurate,LOL! and my old one was actually pretty decent too.

I've heard from more than one source that the deepfire chambers were also garbage.
Although it mimics the PTW's hop chamber, it does not by any means guarantee performance. Nor is it a huge contributor to the performance of the PTW.
I would RATHER have a PTW style chamber on my aeg, but it's a matter of quality over concept.
AUG's, vfc XCR's, G3 series, FAL and SIG series all use rotary dial hop chambers which are very good at delivering accuracy.
The M14 uses something similar to a PTW style adjuster as well.
I would argue that a well done R-hop on a rotary dial chamber could contend with a PTW hop chamber.
But my point is, don't think you'll get any sort of major performance from an M4 style hop chamber, because they're complete shit. The design is terrible, the adjustment is way too sensitive, and there's too much slack allowed for bounce.
What you want in a hop chamber is absolute rigidity from everything, you want it to be as rigid as a fixed hop, but still adjustable.

Unfortunately my desire for a top performing rifle exceeds my knowledge base and skill set to get it there. The updates I've listed are the extent of my abilities to DIY.

I see all sorts of claims for different things like R hop but I would have no idea how to execute that so I went for the Pro Win.

PDI w-hold rubbers are a nice alternative to rhops. I put one in my vfc and range and accuracy are already improved with nothing else changed yet.

I tried the gun out today at the Hill while we did some construction and the range is definitely improved. I was able to accurately hit the trees near the pond side flag position from the top of the bluff with no problems at all which is about 180 feet or so. :)

Too bad someone can't figure out a way of fitting a VSR10 hop up unit. Consider it is bolt action, it is very very consist even for stock.

+1 to that. I have one in my AEG, GBBR, and my GBBP. Retarded range and consistency.