What DIY upgrades should I perform?:Upgrade Kits: $33-
Inner Barrel: $35-74Echo 1 - This kit comes with "an upgraded metal spring guide, upgraded metal piston, an upgraded spring, and a torque absorbing bearing set." - $33
Angel Custom Advanced Precision Airsoft APS / APS2 / Type 96 / M99 500 FPS SP150 Tune Up Kit - $48
Includes Carbon Steel SP150 high power irregular pitch power-up spring, 100% T6 Aluminum High Performance Piston, 100% T6 Aluminum High Performance Spring Guide with guide rod.
What to look for? Steel and brass are superior materials than aluminum.
Barrel Spacers: $18-20Prometheus 455mm / 6.03mm EG Tight Bore Barrel for Airsoft AEG (AK47, AK47S Length) - $74
New Version Mad Bull Airsoft Black Python 6.03mm tight Bore Inner AEG Barrel. (455mm) - $30
LONGER BARRELS, REQUIRE SILENCER/BARREL EXTENSION
MadBull Ver. 2 Precision Inner Barrel for M16 (509mm) - $35
Why nothing longer?
vindi says: "It has long been accepted in the spring powered bolt action world that anything over 509mm is pointless and actually causes the rifle to be less accurate"
You can also make your own if you are on a budget.
Hop Up Chamber: $85Laylax PSS96 barrel spacer - $20
Modify L96 Barrel Spacer Set - $18
Hop Up Bucking: $5-16PDI Hop-Up Unit for Maruzen Type 96 Airsoft Sniper Rifle UTG L96 - $85
Spring: $15-20Guarder improved hop bucking (Hard) - $5
Firefly Hop Bucking - Hard - $16
Scope: $45-70Angel Custom PSS2 Mega-Up APS / Type96 Power Up Spring - SP150 (420~520 FPS) - $15
FF PSS2 M150 (thick type) - $18
Angel Custom PSS2 Mega-Up APS / Type96 Power Up Spring - SP170 (480~550 FPS) - $15
FF PSS2 M170 (thick type) - $20
Why nothing more powerful (>170)?:
bobgengeskahn says: "I would also recommend that people NOT put anything over a M150 or M170 spring. I have a M210 in mine and have successfully torqued/bent my bolt handle."
Silencer/Barrel Extension: $23-60 (OPTIONAL)Tactical 3-9x40 Rubber Scope (Ruby Lens) W/ Scope Ring Set by NC Star / AIM - $45
Leapers 5th Gen 3-9x50 AO Mil-Dot Rifle Scope with R/G Reticle, 1" Tube - $70
ELEMENT silencer "NATO" engraved 14mm +/- - $23
Echo1 M28 Type Airsoft Force Recon Barrel Extension - (14mm Negative / Covers up 180mm of outer barrel) - $55
Madbull Gemtech Quick Detatch Mock Supressor Barrel Extension w/ QD Flashhider. (Black) - $60
In general, I know there is more that I don't know than I do know, and I welcome any corrections, comments, or additions.Should I "swiss-cheese" my piston?
Teflon Tape Seal Improvement:vindicareassassin replies: "For all those of you who are thinkin 'Oh, I'll Swiss cheese my piston as it will be lighter and spring forward easier', stop it! Leave such mods to the go faster full auto queens, for a DMR it is a good thing to have the extra weight. You will need the extra weight in the piston to help to shift the heavy weight BBs you should be using, as nothing gets things moving like a heavy object with some inertia behind it. "
Make your own Fishbone Hop Up Nub:
Polish your new barrel: